diff --git a/.azure-pipelines/windows-appx-test.yml b/.azure-pipelines/windows-appx-test.yml
new file mode 100644
index 0000000..9840c0a
--- /dev/null
+++ b/.azure-pipelines/windows-appx-test.yml
@@ -0,0 +1,65 @@
+jobs:
+- job: Prebuild
+  displayName: Pre-build checks
+
+  pool:
+    vmImage: ubuntu-16.04
+
+  steps:
+  - template: ./prebuild-checks.yml
+
+
+- job: Windows_Appx_Tests
+  displayName: Windows Appx Tests
+  dependsOn: Prebuild
+  condition: and(succeeded(), eq(dependencies.Prebuild.outputs['tests.run'], 'true'))
+
+  pool:
+    vmImage: vs2017-win2016
+
+  strategy:
+    matrix:
+      win64:
+        arch: amd64
+        buildOpt: '-p x64'
+        testRunTitle: '$(Build.SourceBranchName)-win64-appx'
+        testRunPlatform: win64
+    maxParallel: 2
+
+  steps:
+  - checkout: self
+    clean: true
+    fetchDepth: 5
+
+  - powershell: |
+      # Relocate build outputs outside of source directory to make cleaning faster
+      Write-Host '##vso[task.setvariable variable=Py_IntDir]$(Build.BinariesDirectory)\obj'
+      # UNDONE: Do not build to a different directory because of broken tests
+      Write-Host '##vso[task.setvariable variable=Py_OutDir]$(Build.SourcesDirectory)\PCbuild'
+      Write-Host '##vso[task.setvariable variable=EXTERNAL_DIR]$(Build.BinariesDirectory)\externals'
+    displayName: Update build locations
+
+  - script: PCbuild\build.bat -e $(buildOpt)
+    displayName: 'Build CPython'
+
+  - script: python.bat PC\layout -vv -s "$(Build.SourcesDirectory)" -b "$(Py_OutDir)\$(arch)" -t "$(Py_IntDir)\layout-tmp-$(arch)" --copy "$(Py_IntDir)\layout-$(arch)" --precompile --preset-appx --include-tests
+    displayName: 'Create APPX layout'
+
+  - script: .\python.exe -m test.pythoninfo
+    workingDirectory: $(Py_IntDir)\layout-$(arch)
+    displayName: 'Display build info'
+
+  - script: .\python.exe -m test -q -uall -u-cpu -rwW --slowest --timeout=1200 -j0 --junit-xml="$(Build.BinariesDirectory)\test-results.xml" --tempdir "$(Py_IntDir)\tmp-$(arch)"
+    workingDirectory: $(Py_IntDir)\layout-$(arch)
+    displayName: 'Tests'
+    env:
+      PREFIX: $(Py_IntDir)\layout-$(arch)
+
+  - task: PublishTestResults@2
+    displayName: 'Publish Test Results'
+    inputs:
+      testResultsFiles: '$(Build.BinariesDirectory)\test-results.xml'
+      mergeTestResults: true
+      testRunTitle: $(testRunTitle)
+      platform: $(testRunPlatform)
+    condition: succeededOrFailed()
diff --git a/.gitattributes b/.gitattributes
index 4a487c3..16237bb 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -19,6 +19,7 @@
 
 # Specific binary files
 Lib/test/sndhdrdata/sndhdr.* binary
+PC/classicAppCompat.* binary
 
 # Text files that should not be subject to eol conversion
 Lib/test/cjkencodings/* -text
diff --git a/Lib/test/test_pathlib.py b/Lib/test/test_pathlib.py
index e436db9..056507e 100644
--- a/Lib/test/test_pathlib.py
+++ b/Lib/test/test_pathlib.py
@@ -1519,7 +1519,7 @@
             # resolves to 'dirB/..' first before resolving to parent of dirB.
             self._check_resolve_relative(p, P(BASE, 'foo', 'in', 'spam'), False)
         # Now create absolute symlinks
-        d = support._longpath(tempfile.mkdtemp(suffix='-dirD'))
+        d = support._longpath(tempfile.mkdtemp(suffix='-dirD', dir=os.getcwd()))
         self.addCleanup(support.rmtree, d)
         os.symlink(os.path.join(d), join('dirA', 'linkX'))
         os.symlink(join('dirB'), os.path.join(d, 'linkY'))
diff --git a/Lib/test/test_venv.py b/Lib/test/test_venv.py
index 461fe7a..22a3b78 100644
--- a/Lib/test/test_venv.py
+++ b/Lib/test/test_venv.py
@@ -243,6 +243,7 @@
             self.assertIn('include-system-site-packages = %s\n' % s, data)
 
     @unittest.skipUnless(can_symlink(), 'Needs symlinks')
+    @unittest.skipIf(os.name == 'nt', 'Symlinks are never used on Windows')
     def test_symlinking(self):
         """
         Test symlinking works as expected
diff --git a/Lib/venv/__init__.py b/Lib/venv/__init__.py
index 716129d..5438b0d 100644
--- a/Lib/venv/__init__.py
+++ b/Lib/venv/__init__.py
@@ -9,6 +9,7 @@
 import shutil
 import subprocess
 import sys
+import sysconfig
 import types
 
 logger = logging.getLogger(__name__)
@@ -63,10 +64,11 @@
         self.system_site_packages = False
         self.create_configuration(context)
         self.setup_python(context)
+        if not self.upgrade:
+            self.setup_scripts(context)
         if self.with_pip:
             self._setup_pip(context)
         if not self.upgrade:
-            self.setup_scripts(context)
             self.post_setup(context)
         if true_system_site_packages:
             # We had set it to False before, now
@@ -157,14 +159,6 @@
             f.write('include-system-site-packages = %s\n' % incl)
             f.write('version = %d.%d.%d\n' % sys.version_info[:3])
 
-    if os.name == 'nt':
-        def include_binary(self, f):
-            if f.endswith(('.pyd', '.dll')):
-                result = True
-            else:
-                result = f.startswith('python') and f.endswith('.exe')
-            return result
-
     def symlink_or_copy(self, src, dst, relative_symlinks_ok=False):
         """
         Try symlinking a file, and if that fails, fall back to copying.
@@ -194,9 +188,9 @@
         binpath = context.bin_path
         path = context.env_exe
         copier = self.symlink_or_copy
-        copier(context.executable, path)
         dirname = context.python_dir
         if os.name != 'nt':
+            copier(context.executable, path)
             if not os.path.islink(path):
                 os.chmod(path, 0o755)
             for suffix in ('python', 'python3'):
@@ -208,32 +202,33 @@
                     if not os.path.islink(path):
                         os.chmod(path, 0o755)
         else:
-            subdir = 'DLLs'
-            include = self.include_binary
-            files = [f for f in os.listdir(dirname) if include(f)]
-            for f in files:
-                src = os.path.join(dirname, f)
-                dst = os.path.join(binpath, f)
-                if dst != context.env_exe:  # already done, above
-                    copier(src, dst)
-            dirname = os.path.join(dirname, subdir)
-            if os.path.isdir(dirname):
-                files = [f for f in os.listdir(dirname) if include(f)]
-                for f in files:
-                    src = os.path.join(dirname, f)
-                    dst = os.path.join(binpath, f)
-                    copier(src, dst)
-            # copy init.tcl over
-            for root, dirs, files in os.walk(context.python_dir):
-                if 'init.tcl' in files:
-                    tcldir = os.path.basename(root)
-                    tcldir = os.path.join(context.env_dir, 'Lib', tcldir)
-                    if not os.path.exists(tcldir):
-                        os.makedirs(tcldir)
-                    src = os.path.join(root, 'init.tcl')
-                    dst = os.path.join(tcldir, 'init.tcl')
-                    shutil.copyfile(src, dst)
-                    break
+            # For normal cases, the venvlauncher will be copied from
+            # our scripts folder. For builds, we need to copy it
+            # manually.
+            if sysconfig.is_python_build(True):
+                suffix = '.exe'
+                if context.python_exe.lower().endswith('_d.exe'):
+                    suffix = '_d.exe'
+
+                src = os.path.join(dirname, "venvlauncher" + suffix)
+                dst = os.path.join(binpath, context.python_exe)
+                copier(src, dst)
+
+                src = os.path.join(dirname, "venvwlauncher" + suffix)
+                dst = os.path.join(binpath, "pythonw" + suffix)
+                copier(src, dst)
+
+                # copy init.tcl over
+                for root, dirs, files in os.walk(context.python_dir):
+                    if 'init.tcl' in files:
+                        tcldir = os.path.basename(root)
+                        tcldir = os.path.join(context.env_dir, 'Lib', tcldir)
+                        if not os.path.exists(tcldir):
+                            os.makedirs(tcldir)
+                        src = os.path.join(root, 'init.tcl')
+                        dst = os.path.join(tcldir, 'init.tcl')
+                        shutil.copyfile(src, dst)
+                        break
 
     def _setup_pip(self, context):
         """Installs or upgrades pip in a virtual environment"""
@@ -320,7 +315,7 @@
                 dstfile = os.path.join(dstdir, f)
                 with open(srcfile, 'rb') as f:
                     data = f.read()
-                if not srcfile.endswith('.exe'):
+                if not srcfile.endswith(('.exe', '.pdb')):
                     try:
                         data = data.decode('utf-8')
                         data = self.replace_variables(data, context)
diff --git a/Misc/NEWS.d/next/Windows/2018-10-30-13-39-17.bpo-34977.0l7_QV.rst b/Misc/NEWS.d/next/Windows/2018-10-30-13-39-17.bpo-34977.0l7_QV.rst
new file mode 100644
index 0000000..8e1a4ba
--- /dev/null
+++ b/Misc/NEWS.d/next/Windows/2018-10-30-13-39-17.bpo-34977.0l7_QV.rst
@@ -0,0 +1 @@
+Adds support for building a Windows App Store package
diff --git a/PC/classicAppCompat.can.xml b/PC/classicAppCompat.can.xml
new file mode 100644
index 0000000..f00475c
--- /dev/null
+++ b/PC/classicAppCompat.can.xml
@@ -0,0 +1 @@
+<CustomCapabilityDescriptor xmlns="http://schemas.microsoft.com/appx/2016/sccd" xmlns:s="http://schemas.microsoft.com/appx/2016/sccd"><CustomCapabilities><CustomCapability Name="Microsoft.classicAppCompat_8wekyb3d8bbwe"></CustomCapability></CustomCapabilities><AuthorizedEntities><AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.7_qbz5n2kfra8p0" CertificateSignatureHash="0000000000000000000000000000000000000000000000000000000000000000"></AuthorizedEntity><AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0" CertificateSignatureHash="0000000000000000000000000000000000000000000000000000000000000000"></AuthorizedEntity><AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0" CertificateSignatureHash="0000000000000000000000000000000000000000000000000000000000000000"></AuthorizedEntity><AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0" CertificateSignatureHash="0000000000000000000000000000000000000000000000000000000000000000"></AuthorizedEntity><AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.11_qbz5n2kfra8p0" CertificateSignatureHash="0000000000000000000000000000000000000000000000000000000000000000"></AuthorizedEntity><AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.12_qbz5n2kfra8p0" CertificateSignatureHash="0000000000000000000000000000000000000000000000000000000000000000"></AuthorizedEntity><AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0" CertificateSignatureHash="0000000000000000000000000000000000000000000000000000000000000000"></AuthorizedEntity><AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.14_qbz5n2kfra8p0" CertificateSignatureHash="0000000000000000000000000000000000000000000000000000000000000000"></AuthorizedEntity><AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.15_qbz5n2kfra8p0" CertificateSignatureHash="0000000000000000000000000000000000000000000000000000000000000000"></AuthorizedEntity><AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.7_qbz5n2kfra8p0" CertificateSignatureHash="279cd652c4e252bfbe5217ac722205d7729ba409148cfa9e6d9e5b1cb94eaff1"></AuthorizedEntity><AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0" CertificateSignatureHash="279cd652c4e252bfbe5217ac722205d7729ba409148cfa9e6d9e5b1cb94eaff1"></AuthorizedEntity><AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0" CertificateSignatureHash="279cd652c4e252bfbe5217ac722205d7729ba409148cfa9e6d9e5b1cb94eaff1"></AuthorizedEntity><AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0" CertificateSignatureHash="279cd652c4e252bfbe5217ac722205d7729ba409148cfa9e6d9e5b1cb94eaff1"></AuthorizedEntity><AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.11_qbz5n2kfra8p0" CertificateSignatureHash="279cd652c4e252bfbe5217ac722205d7729ba409148cfa9e6d9e5b1cb94eaff1"></AuthorizedEntity><AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.12_qbz5n2kfra8p0" CertificateSignatureHash="279cd652c4e252bfbe5217ac722205d7729ba409148cfa9e6d9e5b1cb94eaff1"></AuthorizedEntity><AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0" CertificateSignatureHash="279cd652c4e252bfbe5217ac722205d7729ba409148cfa9e6d9e5b1cb94eaff1"></AuthorizedEntity><AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.14_qbz5n2kfra8p0" CertificateSignatureHash="279cd652c4e252bfbe5217ac722205d7729ba409148cfa9e6d9e5b1cb94eaff1"></AuthorizedEntity><AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.15_qbz5n2kfra8p0" CertificateSignatureHash="279cd652c4e252bfbe5217ac722205d7729ba409148cfa9e6d9e5b1cb94eaff1"></AuthorizedEntity></AuthorizedEntities></CustomCapabilityDescriptor>
\ No newline at end of file
diff --git a/PC/classicAppCompat.cat b/PC/classicAppCompat.cat
new file mode 100644
index 0000000..3d21359
--- /dev/null
+++ b/PC/classicAppCompat.cat
Binary files differ
diff --git a/PC/classicAppCompat.sccd b/PC/classicAppCompat.sccd
new file mode 100644
index 0000000..9764898
--- /dev/null
+++ b/PC/classicAppCompat.sccd
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
+<CustomCapabilityDescriptor xmlns="http://schemas.microsoft.com/appx/2016/sccd" xmlns:s="http://schemas.microsoft.com/appx/2016/sccd">
+	<CustomCapabilities>
+		<CustomCapability Name="Microsoft.classicAppCompat_8wekyb3d8bbwe"/>
+	</CustomCapabilities>
+	<AuthorizedEntities>
+		<!--PFN for store installation-->
+		<AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.7_qbz5n2kfra8p0" CertificateSignatureHash="0000000000000000000000000000000000000000000000000000000000000000"/>
+		<AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0" CertificateSignatureHash="0000000000000000000000000000000000000000000000000000000000000000"/>
+		<AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0" CertificateSignatureHash="0000000000000000000000000000000000000000000000000000000000000000"/>
+		<AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0" CertificateSignatureHash="0000000000000000000000000000000000000000000000000000000000000000"/>
+		<AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.11_qbz5n2kfra8p0" CertificateSignatureHash="0000000000000000000000000000000000000000000000000000000000000000"/>
+		<AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.12_qbz5n2kfra8p0" CertificateSignatureHash="0000000000000000000000000000000000000000000000000000000000000000"/>
+		<AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0" CertificateSignatureHash="0000000000000000000000000000000000000000000000000000000000000000"/>
+		<AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.14_qbz5n2kfra8p0" CertificateSignatureHash="0000000000000000000000000000000000000000000000000000000000000000"/>
+		<AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.15_qbz5n2kfra8p0" CertificateSignatureHash="0000000000000000000000000000000000000000000000000000000000000000"/>
+		<AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.7_qbz5n2kfra8p0" CertificateSignatureHash="279cd652c4e252bfbe5217ac722205d7729ba409148cfa9e6d9e5b1cb94eaff1"/>
+		<AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0" CertificateSignatureHash="279cd652c4e252bfbe5217ac722205d7729ba409148cfa9e6d9e5b1cb94eaff1"/>
+		<AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0" CertificateSignatureHash="279cd652c4e252bfbe5217ac722205d7729ba409148cfa9e6d9e5b1cb94eaff1"/>
+		<AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0" CertificateSignatureHash="279cd652c4e252bfbe5217ac722205d7729ba409148cfa9e6d9e5b1cb94eaff1"/>
+		<AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.11_qbz5n2kfra8p0" CertificateSignatureHash="279cd652c4e252bfbe5217ac722205d7729ba409148cfa9e6d9e5b1cb94eaff1"/>
+		<AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.12_qbz5n2kfra8p0" CertificateSignatureHash="279cd652c4e252bfbe5217ac722205d7729ba409148cfa9e6d9e5b1cb94eaff1"/>
+		<AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0" CertificateSignatureHash="279cd652c4e252bfbe5217ac722205d7729ba409148cfa9e6d9e5b1cb94eaff1"/>
+		<AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.14_qbz5n2kfra8p0" CertificateSignatureHash="279cd652c4e252bfbe5217ac722205d7729ba409148cfa9e6d9e5b1cb94eaff1"/>
+		<AuthorizedEntity AppPackageFamilyName="PythonSoftwareFoundation.Python.3.15_qbz5n2kfra8p0" CertificateSignatureHash="279cd652c4e252bfbe5217ac722205d7729ba409148cfa9e6d9e5b1cb94eaff1"/>
+	</AuthorizedEntities>
+	<!--Once signed, this file can no longer be modified-->
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</Catalog></CustomCapabilityDescriptor>
diff --git a/PC/getpathp.c b/PC/getpathp.c
index bc85b58..4075463 100644
--- a/PC/getpathp.c
+++ b/PC/getpathp.c
@@ -536,10 +536,16 @@
 get_program_full_path(const _PyCoreConfig *core_config,
                       PyCalculatePath *calculate, _PyPathConfig *config)
 {
+    const wchar_t *pyvenv_launcher;
     wchar_t program_full_path[MAXPATHLEN+1];
     memset(program_full_path, 0, sizeof(program_full_path));
 
-    if (!GetModuleFileNameW(NULL, program_full_path, MAXPATHLEN)) {
+    /* The launcher may need to force the executable path to a
+     * different environment, so override it here. */
+    pyvenv_launcher = _wgetenv(L"__PYVENV_LAUNCHER__");
+    if (pyvenv_launcher && pyvenv_launcher[0]) {
+        wcscpy_s(program_full_path, MAXPATHLEN+1, pyvenv_launcher);
+    } else if (!GetModuleFileNameW(NULL, program_full_path, MAXPATHLEN)) {
         /* GetModuleFileName should never fail when passed NULL */
         return _Py_INIT_ERR("Cannot determine program path");
     }
diff --git a/PC/icons/pythonwx150.png b/PC/icons/pythonwx150.png
new file mode 100644
index 0000000..4c3eb31
--- /dev/null
+++ b/PC/icons/pythonwx150.png
Binary files differ
diff --git a/PC/icons/pythonwx44.png b/PC/icons/pythonwx44.png
new file mode 100644
index 0000000..e3b32a8
--- /dev/null
+++ b/PC/icons/pythonwx44.png
Binary files differ
diff --git a/PC/icons/pythonx150.png b/PC/icons/pythonx150.png
new file mode 100644
index 0000000..5f8d304
--- /dev/null
+++ b/PC/icons/pythonx150.png
Binary files differ
diff --git a/PC/icons/pythonx44.png b/PC/icons/pythonx44.png
new file mode 100644
index 0000000..3881daa
--- /dev/null
+++ b/PC/icons/pythonx44.png
Binary files differ
diff --git a/PC/icons/pythonx50.png b/PC/icons/pythonx50.png
new file mode 100644
index 0000000..7cc3aec
--- /dev/null
+++ b/PC/icons/pythonx50.png
Binary files differ
diff --git a/PC/launcher.c b/PC/launcher.c
index 7d666aa..0242f26 100644
--- a/PC/launcher.c
+++ b/PC/launcher.c
@@ -28,7 +28,7 @@
 #define RC_NO_PYTHON        103
 #define RC_NO_MEMORY        104
 /*
- * SCRIPT_WRAPPER is used to choose between two variants of an executable built
+ * SCRIPT_WRAPPER is used to choose one of the variants of an executable built
  * from this source file. If not defined, the PEP 397 Python launcher is built;
  * if defined, a script launcher of the type used by setuptools is built, which
  * looks for a script name related to the executable name and runs that script
@@ -40,6 +40,15 @@
 #if defined(SCRIPT_WRAPPER)
 #define RC_NO_SCRIPT        105
 #endif
+/*
+ * VENV_REDIRECT is used to choose the variant that looks for an adjacent or
+ * one-level-higher pyvenv.cfg, and uses its "home" property to locate and
+ * launch the original python.exe.
+ */
+#if defined(VENV_REDIRECT)
+#define RC_NO_VENV_CFG      106
+#define RC_BAD_VENV_CFG     107
+#endif
 
 /* Just for now - static definition */
 
@@ -97,7 +106,7 @@
 #if !defined(_WINDOWS)
     fwprintf(stderr, L"%ls\n", message);
 #else
-    MessageBox(NULL, message, TEXT("Python Launcher is sorry to say ..."),
+    MessageBoxW(NULL, message, L"Python Launcher is sorry to say ...",
                MB_OK);
 #endif
     exit(rc);
@@ -131,6 +140,17 @@
     return buf;
 }
 
+#if defined(_DEBUG)
+#if defined(_WINDOWS)
+
+#define PYTHON_EXECUTABLE L"pythonw_d.exe"
+
+#else
+
+#define PYTHON_EXECUTABLE L"python_d.exe"
+
+#endif
+#else
 #if defined(_WINDOWS)
 
 #define PYTHON_EXECUTABLE L"pythonw.exe"
@@ -140,6 +160,7 @@
 #define PYTHON_EXECUTABLE L"python.exe"
 
 #endif
+#endif
 
 #define MAX_VERSION_SIZE    4
 
@@ -1118,6 +1139,7 @@
     { 3320, 3351, L"3.5" },
     { 3360, 3379, L"3.6" },
     { 3390, 3399, L"3.7" },
+    { 3400, 3409, L"3.8" },
     { 0 }
 };
 
@@ -1456,6 +1478,87 @@
     return FALSE; /* If this has been called we cannot continue */
 }
 
+#if defined(VENV_REDIRECT)
+
+static int
+find_home_value(const char *buffer, const char **start, DWORD *length)
+{
+    for (const char *s = strstr(buffer, "home"); s; s = strstr(s + 1, "\nhome")) {
+        if (*s == '\n') {
+            ++s;
+        }
+        for (int i = 4; i > 0 && *s; --i, ++s);
+
+        while (*s && iswspace(*s)) {
+            ++s;
+        }
+        if (*s != L'=') {
+            continue;
+        }
+
+        do {
+            ++s;
+        } while (*s && iswspace(*s));
+
+        *start = s;
+        char *nl = strchr(s, '\n');
+        if (nl) {
+            *length = (DWORD)((ptrdiff_t)nl - (ptrdiff_t)s);
+        } else {
+            *length = (DWORD)strlen(s);
+        }
+        return 1;
+    }
+    return 0;
+}
+#endif
+
+static wchar_t *
+wcsdup_pad(const wchar_t *s, int padding, int *newlen)
+{
+    size_t len = wcslen(s);
+    len += 1 + padding;
+    wchar_t *r = (wchar_t *)malloc(len * sizeof(wchar_t));
+    if (!r) {
+        return NULL;
+    }
+    if (wcscpy_s(r, len, s)) {
+        free(r);
+        return NULL;
+    }
+    *newlen = len < MAXINT ? (int)len : MAXINT;
+    return r;
+}
+
+static wchar_t *
+get_process_name()
+{
+    DWORD bufferLen = MAX_PATH;
+    DWORD len = bufferLen;
+    wchar_t *r = NULL;
+
+    while (!r) {
+        r = (wchar_t *)malloc(bufferLen * sizeof(wchar_t));
+        if (!r) {
+            error(RC_NO_MEMORY, L"out of memory");
+            return NULL;
+        }
+        len = GetModuleFileNameW(NULL, r, bufferLen);
+        if (len == 0) {
+            free(r);
+            error(0, L"Failed to get module name");
+            return NULL;
+        } else if (len == bufferLen &&
+                   GetLastError() == ERROR_INSUFFICIENT_BUFFER) {
+            free(r);
+            r = NULL;
+            bufferLen *= 2;
+        }
+    }
+
+    return r;
+}
+
 static int
 process(int argc, wchar_t ** argv)
 {
@@ -1463,21 +1566,27 @@
     wchar_t * command;
     wchar_t * executable;
     wchar_t * p;
+    wchar_t * argv0;
     int rc = 0;
-    size_t plen;
     INSTALLED_PYTHON * ip;
     BOOL valid;
     DWORD size, attrs;
-    HRESULT hr;
     wchar_t message[MSGSIZE];
     void * version_data;
     VS_FIXEDFILEINFO * file_info;
     UINT block_size;
-    int index;
-#if defined(SCRIPT_WRAPPER)
+#if defined(VENV_REDIRECT)
+    wchar_t * venv_cfg_path;
     int newlen;
+#elif defined(SCRIPT_WRAPPER)
     wchar_t * newcommand;
     wchar_t * av[2];
+    int newlen;
+    HRESULT hr;
+    int index;
+#else
+    HRESULT hr;
+    int index;
 #endif
 
     setvbuf(stderr, (char *)NULL, _IONBF, 0);
@@ -1495,6 +1604,7 @@
 #else
     debug(L"launcher executable: Console\n");
 #endif
+#if !defined(VENV_REDIRECT)
     /* Get the local appdata folder (non-roaming) */
     hr = SHGetFolderPathW(NULL, CSIDL_LOCAL_APPDATA,
                           NULL, 0, appdata_ini_path);
@@ -1503,9 +1613,7 @@
         appdata_ini_path[0] = L'\0';
     }
     else {
-        plen = wcslen(appdata_ini_path);
-        p = &appdata_ini_path[plen];
-        wcsncpy_s(p, MAX_PATH - plen, L"\\py.ini", _TRUNCATE);
+        wcsncat_s(appdata_ini_path, MAX_PATH, L"\\py.ini", _TRUNCATE);
         attrs = GetFileAttributesW(appdata_ini_path);
         if (attrs == INVALID_FILE_ATTRIBUTES) {
             debug(L"File '%ls' non-existent\n", appdata_ini_path);
@@ -1514,8 +1622,9 @@
             debug(L"Using local configuration file '%ls'\n", appdata_ini_path);
         }
     }
-    plen = GetModuleFileNameW(NULL, launcher_ini_path, MAX_PATH);
-    size = GetFileVersionInfoSizeW(launcher_ini_path, &size);
+#endif
+    argv0 = get_process_name();
+    size = GetFileVersionInfoSizeW(argv0, &size);
     if (size == 0) {
         winerror(GetLastError(), message, MSGSIZE);
         debug(L"GetFileVersionInfoSize failed: %ls\n", message);
@@ -1523,7 +1632,7 @@
     else {
         version_data = malloc(size);
         if (version_data) {
-            valid = GetFileVersionInfoW(launcher_ini_path, 0, size,
+            valid = GetFileVersionInfoW(argv0, 0, size,
                                         version_data);
             if (!valid)
                 debug(L"GetFileVersionInfo failed: %X\n", GetLastError());
@@ -1540,15 +1649,51 @@
             free(version_data);
         }
     }
+
+#if defined(VENV_REDIRECT)
+    /* Allocate some extra space for new filenames */
+    venv_cfg_path = wcsdup_pad(argv0, 32, &newlen);
+    if (!venv_cfg_path) {
+        error(RC_NO_MEMORY, L"Failed to copy module name");
+    }
+    p = wcsrchr(venv_cfg_path, L'\\');
+
+    if (p == NULL) {
+        error(RC_NO_VENV_CFG, L"No pyvenv.cfg file");
+    }
+    p[0] = L'\0';
+    wcscat_s(venv_cfg_path, newlen, L"\\pyvenv.cfg");
+    attrs = GetFileAttributesW(venv_cfg_path);
+    if (attrs == INVALID_FILE_ATTRIBUTES) {
+        debug(L"File '%ls' non-existent\n", venv_cfg_path);
+        p[0] = '\0';
+        p = wcsrchr(venv_cfg_path, L'\\');
+        if (p != NULL) {
+            p[0] = '\0';
+            wcscat_s(venv_cfg_path, newlen, L"\\pyvenv.cfg");
+            attrs = GetFileAttributesW(venv_cfg_path);
+            if (attrs == INVALID_FILE_ATTRIBUTES) {
+                debug(L"File '%ls' non-existent\n", venv_cfg_path);
+                error(RC_NO_VENV_CFG, L"No pyvenv.cfg file");
+            }
+        }
+    }
+    debug(L"Using venv configuration file '%ls'\n", venv_cfg_path);
+#else
+    /* Allocate some extra space for new filenames */
+    if (wcscpy_s(launcher_ini_path, MAX_PATH, argv0)) {
+        error(RC_NO_MEMORY, L"Failed to copy module name");
+    }
     p = wcsrchr(launcher_ini_path, L'\\');
+
     if (p == NULL) {
         debug(L"GetModuleFileNameW returned value has no backslash: %ls\n",
               launcher_ini_path);
         launcher_ini_path[0] = L'\0';
     }
     else {
-        wcsncpy_s(p, MAX_PATH - (p - launcher_ini_path), L"\\py.ini",
-                  _TRUNCATE);
+        p[0] = L'\0';
+        wcscat_s(launcher_ini_path, MAX_PATH, L"\\py.ini");
         attrs = GetFileAttributesW(launcher_ini_path);
         if (attrs == INVALID_FILE_ATTRIBUTES) {
             debug(L"File '%ls' non-existent\n", launcher_ini_path);
@@ -1557,6 +1702,7 @@
             debug(L"Using global configuration file '%ls'\n", launcher_ini_path);
         }
     }
+#endif
 
     command = skip_me(GetCommandLineW());
     debug(L"Called with command line: %ls\n", command);
@@ -1592,6 +1738,52 @@
         command = newcommand;
         valid = FALSE;
     }
+#elif defined(VENV_REDIRECT)
+    {
+        FILE *f;
+        char buffer[4096]; /* 4KB should be enough for anybody */
+        char *start;
+        DWORD len, cch, cch_actual;
+        size_t cb;
+        if (_wfopen_s(&f, venv_cfg_path, L"r")) {
+            error(RC_BAD_VENV_CFG, L"Cannot read '%ls'", venv_cfg_path);
+        }
+        cb = fread_s(buffer, sizeof(buffer), sizeof(buffer[0]),
+                     sizeof(buffer) / sizeof(buffer[0]), f);
+        fclose(f);
+
+        if (!find_home_value(buffer, &start, &len)) {
+            error(RC_BAD_VENV_CFG, L"Cannot find home in '%ls'",
+                  venv_cfg_path);
+        }
+
+        cch = MultiByteToWideChar(CP_UTF8, 0, start, len, NULL, 0);
+        if (!cch) {
+            error(0, L"Cannot determine memory for home path");
+        }
+        cch += (DWORD)wcslen(PYTHON_EXECUTABLE) + 1 + 1; /* include sep and null */
+        executable = (wchar_t *)malloc(cch * sizeof(wchar_t));
+        cch_actual = MultiByteToWideChar(CP_UTF8, 0, start, len, executable, cch);
+        if (!cch_actual) {
+            error(RC_BAD_VENV_CFG, L"Cannot decode home path in '%ls'",
+                  venv_cfg_path);
+        }
+        if (executable[cch_actual - 1] != L'\\') {
+            executable[cch_actual++] = L'\\';
+            executable[cch_actual] = L'\0';
+        }
+        if (wcscat_s(executable, cch, PYTHON_EXECUTABLE)) {
+            error(RC_BAD_VENV_CFG, L"Cannot create executable path from '%ls'",
+                  venv_cfg_path);
+        }
+        if (GetFileAttributesW(executable) == INVALID_FILE_ATTRIBUTES) {
+            error(RC_NO_PYTHON, L"No Python at '%ls'", executable);
+        }
+        if (!SetEnvironmentVariableW(L"__PYVENV_LAUNCHER__", argv0)) {
+            error(0, L"Failed to set launcher environment");
+        }
+        valid = 1;
+    }
 #else
     if (argc <= 1) {
         valid = FALSE;
@@ -1599,7 +1791,6 @@
     }
     else {
         p = argv[1];
-        plen = wcslen(p);
         if ((argc == 2) && // list version args
             (!wcsncmp(p, L"-0", wcslen(L"-0")) ||
             !wcsncmp(p, L"--list", wcslen(L"--list"))))
diff --git a/PC/layout/__init__.py b/PC/layout/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/PC/layout/__init__.py
diff --git a/PC/layout/__main__.py b/PC/layout/__main__.py
new file mode 100644
index 0000000..f7aa1e6
--- /dev/null
+++ b/PC/layout/__main__.py
@@ -0,0 +1,14 @@
+import sys
+
+try:
+    import layout
+except ImportError:
+    # Failed to import our package, which likely means we were started directly
+    # Add the additional search path needed to locate our module.
+    from pathlib import Path
+
+    sys.path.insert(0, str(Path(__file__).resolve().parent.parent))
+
+from layout.main import main
+
+sys.exit(int(main() or 0))
diff --git a/PC/layout/main.py b/PC/layout/main.py
new file mode 100644
index 0000000..82d0536
--- /dev/null
+++ b/PC/layout/main.py
@@ -0,0 +1,612 @@
+"""
+Generates a layout of Python for Windows from a build.
+
+See python make_layout.py --help for usage.
+"""
+
+__author__ = "Steve Dower <steve.dower@python.org>"
+__version__ = "3.8"
+
+import argparse
+import functools
+import os
+import re
+import shutil
+import subprocess
+import sys
+import tempfile
+import zipfile
+
+from pathlib import Path
+
+if __name__ == "__main__":
+    # Started directly, so enable relative imports
+    __path__ = [str(Path(__file__).resolve().parent)]
+
+from .support.appxmanifest import *
+from .support.catalog import *
+from .support.constants import *
+from .support.filesets import *
+from .support.logging import *
+from .support.options import *
+from .support.pip import *
+from .support.props import *
+
+BDIST_WININST_FILES_ONLY = FileNameSet("wininst-*", "bdist_wininst.py")
+BDIST_WININST_STUB = "PC/layout/support/distutils.command.bdist_wininst.py"
+
+TEST_PYDS_ONLY = FileStemSet("xxlimited", "_ctypes_test", "_test*")
+TEST_DIRS_ONLY = FileNameSet("test", "tests")
+
+IDLE_DIRS_ONLY = FileNameSet("idlelib")
+
+TCLTK_PYDS_ONLY = FileStemSet("tcl*", "tk*", "_tkinter")
+TCLTK_DIRS_ONLY = FileNameSet("tkinter", "turtledemo")
+TCLTK_FILES_ONLY = FileNameSet("turtle.py")
+
+VENV_DIRS_ONLY = FileNameSet("venv", "ensurepip")
+
+EXCLUDE_FROM_PYDS = FileStemSet("python*", "pyshellext")
+EXCLUDE_FROM_LIB = FileNameSet("*.pyc", "__pycache__", "*.pickle")
+EXCLUDE_FROM_PACKAGED_LIB = FileNameSet("readme.txt")
+EXCLUDE_FROM_COMPILE = FileNameSet("badsyntax_*", "bad_*")
+EXCLUDE_FROM_CATALOG = FileSuffixSet(".exe", ".pyd", ".dll")
+
+REQUIRED_DLLS = FileStemSet("libcrypto*", "libssl*")
+
+LIB2TO3_GRAMMAR_FILES = FileNameSet("Grammar.txt", "PatternGrammar.txt")
+
+PY_FILES = FileSuffixSet(".py")
+PYC_FILES = FileSuffixSet(".pyc")
+CAT_FILES = FileSuffixSet(".cat")
+CDF_FILES = FileSuffixSet(".cdf")
+
+DATA_DIRS = FileNameSet("data")
+
+TOOLS_DIRS = FileNameSet("scripts", "i18n", "pynche", "demo", "parser")
+TOOLS_FILES = FileSuffixSet(".py", ".pyw", ".txt")
+
+
+def get_lib_layout(ns):
+    def _c(f):
+        if f in EXCLUDE_FROM_LIB:
+            return False
+        if f.is_dir():
+            if f in TEST_DIRS_ONLY:
+                return ns.include_tests
+            if f in TCLTK_DIRS_ONLY:
+                return ns.include_tcltk
+            if f in IDLE_DIRS_ONLY:
+                return ns.include_idle
+            if f in VENV_DIRS_ONLY:
+                return ns.include_venv
+        else:
+            if f in TCLTK_FILES_ONLY:
+                return ns.include_tcltk
+            if f in BDIST_WININST_FILES_ONLY:
+                return ns.include_bdist_wininst
+        return True
+
+    for dest, src in rglob(ns.source / "Lib", "**/*", _c):
+        yield dest, src
+
+    if not ns.include_bdist_wininst:
+        src = ns.source / BDIST_WININST_STUB
+        yield Path("distutils/command/bdist_wininst.py"), src
+
+
+def get_tcltk_lib(ns):
+    if not ns.include_tcltk:
+        return
+
+    tcl_lib = os.getenv("TCL_LIBRARY")
+    if not tcl_lib or not os.path.isdir(tcl_lib):
+        try:
+            with open(ns.build / "TCL_LIBRARY.env", "r", encoding="utf-8-sig") as f:
+                tcl_lib = f.read().strip()
+        except FileNotFoundError:
+            pass
+        if not tcl_lib or not os.path.isdir(tcl_lib):
+            warn("Failed to find TCL_LIBRARY")
+            return
+
+    for dest, src in rglob(Path(tcl_lib).parent, "**/*"):
+        yield "tcl/{}".format(dest), src
+
+
+def get_layout(ns):
+    def in_build(f, dest="", new_name=None):
+        n, _, x = f.rpartition(".")
+        n = new_name or n
+        src = ns.build / f
+        if ns.debug and src not in REQUIRED_DLLS:
+            if not src.stem.endswith("_d"):
+                src = src.parent / (src.stem + "_d" + src.suffix)
+            if not n.endswith("_d"):
+                n += "_d"
+                f = n + "." + x
+        yield dest + n + "." + x, src
+        if ns.include_symbols:
+            pdb = src.with_suffix(".pdb")
+            if pdb.is_file():
+                yield dest + n + ".pdb", pdb
+        if ns.include_dev:
+            lib = src.with_suffix(".lib")
+            if lib.is_file():
+                yield "libs/" + n + ".lib", lib
+
+    yield from in_build("python_uwp.exe", new_name="python")
+    yield from in_build("pythonw_uwp.exe", new_name="pythonw")
+
+    yield from in_build(PYTHON_DLL_NAME)
+
+    if ns.include_launchers:
+        if ns.include_pip:
+            yield from in_build("python_uwp.exe", new_name="pip")
+        if ns.include_idle:
+            yield from in_build("pythonw_uwp.exe", new_name="idle")
+
+    if ns.include_stable:
+        yield from in_build(PYTHON_STABLE_DLL_NAME)
+
+    for dest, src in rglob(ns.build, "vcruntime*.dll"):
+        yield dest, src
+
+    for dest, src in rglob(ns.build, ("*.pyd", "*.dll")):
+        if src.stem.endswith("_d") != bool(ns.debug) and src not in REQUIRED_DLLS:
+            continue
+        if src in EXCLUDE_FROM_PYDS:
+            continue
+        if src in TEST_PYDS_ONLY and not ns.include_tests:
+            continue
+        if src in TCLTK_PYDS_ONLY and not ns.include_tcltk:
+            continue
+
+        yield from in_build(src.name, dest="" if ns.flat_dlls else "DLLs/")
+
+    if ns.zip_lib:
+        zip_name = PYTHON_ZIP_NAME
+        yield zip_name, ns.temp / zip_name
+    else:
+        for dest, src in get_lib_layout(ns):
+            yield "Lib/{}".format(dest), src
+
+        if ns.include_venv:
+            yield from in_build("venvlauncher.exe", "Lib/venv/scripts/nt/", "python")
+            yield from in_build("venvwlauncher.exe", "Lib/venv/scripts/nt/", "pythonw")
+
+    if ns.include_tools:
+
+        def _c(d):
+            if d.is_dir():
+                return d in TOOLS_DIRS
+            return d in TOOLS_FILES
+
+        for dest, src in rglob(ns.source / "Tools", "**/*", _c):
+            yield "Tools/{}".format(dest), src
+
+    if ns.include_underpth:
+        yield PYTHON_PTH_NAME, ns.temp / PYTHON_PTH_NAME
+
+    if ns.include_dev:
+
+        def _c(d):
+            if d.is_dir():
+                return d.name != "internal"
+            return True
+
+        for dest, src in rglob(ns.source / "Include", "**/*.h", _c):
+            yield "include/{}".format(dest), src
+        src = ns.source / "PC" / "pyconfig.h"
+        yield "include/pyconfig.h", src
+
+    for dest, src in get_tcltk_lib(ns):
+        yield dest, src
+
+    if ns.include_pip:
+        pip_dir = get_pip_dir(ns)
+        if not pip_dir.is_dir():
+            log_warning("Failed to find {} - pip will not be included", pip_dir)
+        else:
+            pkg_root = "packages/{}" if ns.zip_lib else "Lib/site-packages/{}"
+            for dest, src in rglob(pip_dir, "**/*"):
+                if src in EXCLUDE_FROM_LIB or src in EXCLUDE_FROM_PACKAGED_LIB:
+                    continue
+                yield pkg_root.format(dest), src
+
+    if ns.include_chm:
+        for dest, src in rglob(ns.doc_build / "htmlhelp", PYTHON_CHM_NAME):
+            yield "Doc/{}".format(dest), src
+
+    if ns.include_html_doc:
+        for dest, src in rglob(ns.doc_build / "html", "**/*"):
+            yield "Doc/html/{}".format(dest), src
+
+    if ns.include_props:
+        for dest, src in get_props_layout(ns):
+            yield dest, src
+
+    for dest, src in get_appx_layout(ns):
+        yield dest, src
+
+    if ns.include_cat:
+        if ns.flat_dlls:
+            yield ns.include_cat.name, ns.include_cat
+        else:
+            yield "DLLs/{}".format(ns.include_cat.name), ns.include_cat
+
+
+def _compile_one_py(src, dest, name, optimize):
+    import py_compile
+
+    if dest is not None:
+        dest = str(dest)
+
+    try:
+        return Path(
+            py_compile.compile(
+                str(src),
+                dest,
+                str(name),
+                doraise=True,
+                optimize=optimize,
+                invalidation_mode=py_compile.PycInvalidationMode.CHECKED_HASH,
+            )
+        )
+    except py_compile.PyCompileError:
+        log_warning("Failed to compile {}", src)
+        return None
+
+
+def _py_temp_compile(src, ns, dest_dir=None):
+    if not ns.precompile or src not in PY_FILES or src.parent in DATA_DIRS:
+        return None
+
+    dest = (dest_dir or ns.temp) / (src.stem + ".py")
+    return _compile_one_py(src, dest.with_suffix(".pyc"), dest, optimize=2)
+
+
+def _write_to_zip(zf, dest, src, ns):
+    pyc = _py_temp_compile(src, ns)
+    if pyc:
+        try:
+            zf.write(str(pyc), dest.with_suffix(".pyc"))
+        finally:
+            try:
+                pyc.unlink()
+            except:
+                log_exception("Failed to delete {}", pyc)
+        return
+
+    if src in LIB2TO3_GRAMMAR_FILES:
+        from lib2to3.pgen2.driver import load_grammar
+
+        tmp = ns.temp / src.name
+        try:
+            shutil.copy(src, tmp)
+            load_grammar(str(tmp))
+            for f in ns.temp.glob(src.stem + "*.pickle"):
+                zf.write(str(f), str(dest.parent / f.name))
+                try:
+                    f.unlink()
+                except:
+                    log_exception("Failed to delete {}", f)
+        except:
+            log_exception("Failed to compile {}", src)
+        finally:
+            try:
+                tmp.unlink()
+            except:
+                log_exception("Failed to delete {}", tmp)
+
+    zf.write(str(src), str(dest))
+
+
+def generate_source_files(ns):
+    if ns.zip_lib:
+        zip_name = PYTHON_ZIP_NAME
+        zip_path = ns.temp / zip_name
+        if zip_path.is_file():
+            zip_path.unlink()
+        elif zip_path.is_dir():
+            log_error(
+                "Cannot create zip file because a directory exists by the same name"
+            )
+            return
+        log_info("Generating {} in {}", zip_name, ns.temp)
+        ns.temp.mkdir(parents=True, exist_ok=True)
+        with zipfile.ZipFile(zip_path, "w", zipfile.ZIP_DEFLATED) as zf:
+            for dest, src in get_lib_layout(ns):
+                _write_to_zip(zf, dest, src, ns)
+
+    if ns.include_underpth:
+        log_info("Generating {} in {}", PYTHON_PTH_NAME, ns.temp)
+        ns.temp.mkdir(parents=True, exist_ok=True)
+        with open(ns.temp / PYTHON_PTH_NAME, "w", encoding="utf-8") as f:
+            if ns.zip_lib:
+                print(PYTHON_ZIP_NAME, file=f)
+                if ns.include_pip:
+                    print("packages", file=f)
+            else:
+                print("Lib", file=f)
+                print("Lib/site-packages", file=f)
+            if not ns.flat_dlls:
+                print("DLLs", file=f)
+            print(".", file=f)
+            print(file=f)
+            print("# Uncomment to run site.main() automatically", file=f)
+            print("#import site", file=f)
+
+    if ns.include_appxmanifest:
+        log_info("Generating AppxManifest.xml in {}", ns.temp)
+        ns.temp.mkdir(parents=True, exist_ok=True)
+
+        with open(ns.temp / "AppxManifest.xml", "wb") as f:
+            f.write(get_appxmanifest(ns))
+
+        with open(ns.temp / "_resources.xml", "wb") as f:
+            f.write(get_resources_xml(ns))
+
+    if ns.include_pip:
+        pip_dir = get_pip_dir(ns)
+        if not (pip_dir / "pip").is_dir():
+            log_info("Extracting pip to {}", pip_dir)
+            pip_dir.mkdir(parents=True, exist_ok=True)
+            extract_pip_files(ns)
+
+    if ns.include_props:
+        log_info("Generating {} in {}", PYTHON_PROPS_NAME, ns.temp)
+        ns.temp.mkdir(parents=True, exist_ok=True)
+        with open(ns.temp / PYTHON_PROPS_NAME, "wb") as f:
+            f.write(get_props(ns))
+
+
+def _create_zip_file(ns):
+    if not ns.zip:
+        return None
+
+    if ns.zip.is_file():
+        try:
+            ns.zip.unlink()
+        except OSError:
+            log_exception("Unable to remove {}", ns.zip)
+            sys.exit(8)
+    elif ns.zip.is_dir():
+        log_error("Cannot create ZIP file because {} is a directory", ns.zip)
+        sys.exit(8)
+
+    ns.zip.parent.mkdir(parents=True, exist_ok=True)
+    return zipfile.ZipFile(ns.zip, "w", zipfile.ZIP_DEFLATED)
+
+
+def copy_files(files, ns):
+    if ns.copy:
+        ns.copy.mkdir(parents=True, exist_ok=True)
+
+    try:
+        total = len(files)
+    except TypeError:
+        total = None
+    count = 0
+
+    zip_file = _create_zip_file(ns)
+    try:
+        need_compile = []
+        in_catalog = []
+
+        for dest, src in files:
+            count += 1
+            if count % 10 == 0:
+                if total:
+                    log_info("Processed {:>4} of {} files", count, total)
+                else:
+                    log_info("Processed {} files", count)
+            log_debug("Processing {!s}", src)
+
+            if (
+                ns.precompile
+                and src in PY_FILES
+                and src not in EXCLUDE_FROM_COMPILE
+                and src.parent not in DATA_DIRS
+                and os.path.normcase(str(dest)).startswith(os.path.normcase("Lib"))
+            ):
+                if ns.copy:
+                    need_compile.append((dest, ns.copy / dest))
+                else:
+                    (ns.temp / "Lib" / dest).parent.mkdir(parents=True, exist_ok=True)
+                    shutil.copy2(src, ns.temp / "Lib" / dest)
+                    need_compile.append((dest, ns.temp / "Lib" / dest))
+
+            if src not in EXCLUDE_FROM_CATALOG:
+                in_catalog.append((src.name, src))
+
+            if ns.copy:
+                log_debug("Copy {} -> {}", src, ns.copy / dest)
+                (ns.copy / dest).parent.mkdir(parents=True, exist_ok=True)
+                try:
+                    shutil.copy2(src, ns.copy / dest)
+                except shutil.SameFileError:
+                    pass
+
+            if ns.zip:
+                log_debug("Zip {} into {}", src, ns.zip)
+                zip_file.write(src, str(dest))
+
+        if need_compile:
+            for dest, src in need_compile:
+                compiled = [
+                    _compile_one_py(src, None, dest, optimize=0),
+                    _compile_one_py(src, None, dest, optimize=1),
+                    _compile_one_py(src, None, dest, optimize=2),
+                ]
+                for c in compiled:
+                    if not c:
+                        continue
+                    cdest = Path(dest).parent / Path(c).relative_to(src.parent)
+                    if ns.zip:
+                        log_debug("Zip {} into {}", c, ns.zip)
+                        zip_file.write(c, str(cdest))
+                    in_catalog.append((cdest.name, cdest))
+
+        if ns.catalog:
+            # Just write out the CDF now. Compilation and signing is
+            # an extra step
+            log_info("Generating {}", ns.catalog)
+            ns.catalog.parent.mkdir(parents=True, exist_ok=True)
+            write_catalog(ns.catalog, in_catalog)
+
+    finally:
+        if zip_file:
+            zip_file.close()
+
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument("-v", help="Increase verbosity", action="count")
+    parser.add_argument(
+        "-s",
+        "--source",
+        metavar="dir",
+        help="The directory containing the repository root",
+        type=Path,
+        default=None,
+    )
+    parser.add_argument(
+        "-b", "--build", metavar="dir", help="Specify the build directory", type=Path
+    )
+    parser.add_argument(
+        "--doc-build",
+        metavar="dir",
+        help="Specify the docs build directory",
+        type=Path,
+        default=None,
+    )
+    parser.add_argument(
+        "--copy",
+        metavar="directory",
+        help="The name of the directory to copy an extracted layout to",
+        type=Path,
+        default=None,
+    )
+    parser.add_argument(
+        "--zip",
+        metavar="file",
+        help="The ZIP file to write all files to",
+        type=Path,
+        default=None,
+    )
+    parser.add_argument(
+        "--catalog",
+        metavar="file",
+        help="The CDF file to write catalog entries to",
+        type=Path,
+        default=None,
+    )
+    parser.add_argument(
+        "--log",
+        metavar="file",
+        help="Write all operations to the specified file",
+        type=Path,
+        default=None,
+    )
+    parser.add_argument(
+        "-t",
+        "--temp",
+        metavar="file",
+        help="A temporary working directory",
+        type=Path,
+        default=None,
+    )
+    parser.add_argument(
+        "-d", "--debug", help="Include debug build", action="store_true"
+    )
+    parser.add_argument(
+        "-p",
+        "--precompile",
+        help="Include .pyc files instead of .py",
+        action="store_true",
+    )
+    parser.add_argument(
+        "-z", "--zip-lib", help="Include library in a ZIP file", action="store_true"
+    )
+    parser.add_argument(
+        "--flat-dlls", help="Does not create a DLLs directory", action="store_true"
+    )
+    parser.add_argument(
+        "-a",
+        "--include-all",
+        help="Include all optional components",
+        action="store_true",
+    )
+    parser.add_argument(
+        "--include-cat",
+        metavar="file",
+        help="Specify the catalog file to include",
+        type=Path,
+        default=None,
+    )
+    for opt, help in get_argparse_options():
+        parser.add_argument(opt, help=help, action="store_true")
+
+    ns = parser.parse_args()
+    update_presets(ns)
+
+    ns.source = ns.source or (Path(__file__).resolve().parent.parent.parent)
+    ns.build = ns.build or Path(sys.executable).parent
+    ns.temp = ns.temp or Path(tempfile.mkdtemp())
+    ns.doc_build = ns.doc_build or (ns.source / "Doc" / "build")
+    if not ns.source.is_absolute():
+        ns.source = (Path.cwd() / ns.source).resolve()
+    if not ns.build.is_absolute():
+        ns.build = (Path.cwd() / ns.build).resolve()
+    if not ns.temp.is_absolute():
+        ns.temp = (Path.cwd() / ns.temp).resolve()
+    if not ns.doc_build.is_absolute():
+        ns.doc_build = (Path.cwd() / ns.doc_build).resolve()
+    if ns.include_cat and not ns.include_cat.is_absolute():
+        ns.include_cat = (Path.cwd() / ns.include_cat).resolve()
+
+    if ns.copy and not ns.copy.is_absolute():
+        ns.copy = (Path.cwd() / ns.copy).resolve()
+    if ns.zip and not ns.zip.is_absolute():
+        ns.zip = (Path.cwd() / ns.zip).resolve()
+    if ns.catalog and not ns.catalog.is_absolute():
+        ns.catalog = (Path.cwd() / ns.catalog).resolve()
+
+    configure_logger(ns)
+
+    log_info(
+        """OPTIONS
+Source: {ns.source}
+Build:  {ns.build}
+Temp:   {ns.temp}
+
+Copy to: {ns.copy}
+Zip to:  {ns.zip}
+Catalog: {ns.catalog}""",
+        ns=ns,
+    )
+
+    if ns.include_idle and not ns.include_tcltk:
+        log_warning("Assuming --include-tcltk to support --include-idle")
+        ns.include_tcltk = True
+
+    try:
+        generate_source_files(ns)
+        files = list(get_layout(ns))
+        copy_files(files, ns)
+    except KeyboardInterrupt:
+        log_info("Interrupted by Ctrl+C")
+        return 3
+    except SystemExit:
+        raise
+    except:
+        log_exception("Unhandled error")
+
+    if error_was_logged():
+        log_error("Errors occurred.")
+        return 1
+
+
+if __name__ == "__main__":
+    sys.exit(int(main() or 0))
diff --git a/PC/layout/support/__init__.py b/PC/layout/support/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/PC/layout/support/__init__.py
diff --git a/PC/layout/support/appxmanifest.py b/PC/layout/support/appxmanifest.py
new file mode 100644
index 0000000..c5dda70
--- /dev/null
+++ b/PC/layout/support/appxmanifest.py
@@ -0,0 +1,487 @@
+"""
+File generation for APPX/MSIX manifests.
+"""
+
+__author__ = "Steve Dower <steve.dower@python.org>"
+__version__ = "3.8"
+
+
+import collections
+import ctypes
+import io
+import os
+import sys
+
+from pathlib import Path, PureWindowsPath
+from xml.etree import ElementTree as ET
+
+from .constants import *
+
+__all__ = []
+
+
+def public(f):
+    __all__.append(f.__name__)
+    return f
+
+
+APPX_DATA = dict(
+    Name="PythonSoftwareFoundation.Python.{}".format(VER_DOT),
+    Version="{}.{}.{}.0".format(VER_MAJOR, VER_MINOR, VER_FIELD3),
+    Publisher=os.getenv(
+        "APPX_DATA_PUBLISHER", "CN=4975D53F-AA7E-49A5-8B49-EA4FDC1BB66B"
+    ),
+    DisplayName="Python {}".format(VER_DOT),
+    Description="The Python {} runtime and console.".format(VER_DOT),
+    ProcessorArchitecture="x64" if IS_X64 else "x86",
+)
+
+PYTHON_VE_DATA = dict(
+    DisplayName="Python {}".format(VER_DOT),
+    Description="Python interactive console",
+    Square150x150Logo="_resources/pythonx150.png",
+    Square44x44Logo="_resources/pythonx44.png",
+    BackgroundColor="transparent",
+)
+
+PYTHONW_VE_DATA = dict(
+    DisplayName="Python {} (Windowed)".format(VER_DOT),
+    Description="Python windowed app launcher",
+    Square150x150Logo="_resources/pythonwx150.png",
+    Square44x44Logo="_resources/pythonwx44.png",
+    BackgroundColor="transparent",
+    AppListEntry="none",
+)
+
+PIP_VE_DATA = dict(
+    DisplayName="pip (Python {})".format(VER_DOT),
+    Description="pip package manager for Python {}".format(VER_DOT),
+    Square150x150Logo="_resources/pythonx150.png",
+    Square44x44Logo="_resources/pythonx44.png",
+    BackgroundColor="transparent",
+    AppListEntry="none",
+)
+
+IDLE_VE_DATA = dict(
+    DisplayName="IDLE (Python {})".format(VER_DOT),
+    Description="IDLE editor for Python {}".format(VER_DOT),
+    Square150x150Logo="_resources/pythonwx150.png",
+    Square44x44Logo="_resources/pythonwx44.png",
+    BackgroundColor="transparent",
+)
+
+APPXMANIFEST_NS = {
+    "": "http://schemas.microsoft.com/appx/manifest/foundation/windows10",
+    "m": "http://schemas.microsoft.com/appx/manifest/foundation/windows10",
+    "uap": "http://schemas.microsoft.com/appx/manifest/uap/windows10",
+    "rescap": "http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities",
+    "rescap4": "http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities/4",
+    "desktop4": "http://schemas.microsoft.com/appx/manifest/desktop/windows10/4",
+    "desktop6": "http://schemas.microsoft.com/appx/manifest/desktop/windows10/6",
+    "uap3": "http://schemas.microsoft.com/appx/manifest/uap/windows10/3",
+    "uap4": "http://schemas.microsoft.com/appx/manifest/uap/windows10/4",
+    "uap5": "http://schemas.microsoft.com/appx/manifest/uap/windows10/5",
+}
+
+APPXMANIFEST_TEMPLATE = """<?xml version="1.0" encoding="utf-8"?>
+<Package xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10"
+    xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10"
+    xmlns:rescap="http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities"
+    xmlns:rescap4="http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities/4"
+    xmlns:desktop4="http://schemas.microsoft.com/appx/manifest/desktop/windows10/4"
+    xmlns:uap4="http://schemas.microsoft.com/appx/manifest/uap/windows10/4"
+    xmlns:uap5="http://schemas.microsoft.com/appx/manifest/uap/windows10/5">
+    <Identity Name=""
+              Version=""
+              Publisher=""
+              ProcessorArchitecture="" />
+    <Properties>
+        <DisplayName></DisplayName>
+        <PublisherDisplayName>Python Software Foundation</PublisherDisplayName>
+        <Description></Description>
+        <Logo>_resources/pythonx50.png</Logo>
+    </Properties>
+    <Resources>
+        <Resource Language="en-US" />
+    </Resources>
+    <Dependencies>
+        <TargetDeviceFamily Name="Windows.Desktop" MinVersion="10.0.17763.0" MaxVersionTested="" />
+    </Dependencies>
+    <Capabilities>
+        <rescap:Capability Name="runFullTrust"/>
+    </Capabilities>
+    <Applications>
+    </Applications>
+    <Extensions>
+    </Extensions>
+</Package>"""
+
+
+RESOURCES_XML_TEMPLATE = r"""<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<!--This file is input for makepri.exe. It should be excluded from the final package.-->
+<resources targetOsVersion="10.0.0" majorVersion="1">
+    <packaging>
+        <autoResourcePackage qualifier="Language"/>
+        <autoResourcePackage qualifier="Scale"/>
+        <autoResourcePackage qualifier="DXFeatureLevel"/>
+    </packaging>
+    <index root="\" startIndexAt="\">
+        <default>
+            <qualifier name="Language" value="en-US"/>
+            <qualifier name="Contrast" value="standard"/>
+            <qualifier name="Scale" value="100"/>
+            <qualifier name="HomeRegion" value="001"/>
+            <qualifier name="TargetSize" value="256"/>
+            <qualifier name="LayoutDirection" value="LTR"/>
+            <qualifier name="Theme" value="dark"/>
+            <qualifier name="AlternateForm" value=""/>
+            <qualifier name="DXFeatureLevel" value="DX9"/>
+            <qualifier name="Configuration" value=""/>
+            <qualifier name="DeviceFamily" value="Universal"/>
+            <qualifier name="Custom" value=""/>
+        </default>
+        <indexer-config type="folder" foldernameAsQualifier="true" filenameAsQualifier="true" qualifierDelimiter="$"/>
+        <indexer-config type="resw" convertDotsToSlashes="true" initialPath=""/>
+        <indexer-config type="resjson" initialPath=""/>
+        <indexer-config type="PRI"/>
+    </index>
+</resources>"""
+
+
+SCCD_FILENAME = "PC/classicAppCompat.sccd"
+
+REGISTRY = {
+    "HKCU\\Software\\Python\\PythonCore": {
+        VER_DOT: {
+            "DisplayName": APPX_DATA["DisplayName"],
+            "SupportUrl": "https://www.python.org/",
+            "SysArchitecture": "64bit" if IS_X64 else "32bit",
+            "SysVersion": VER_DOT,
+            "Version": "{}.{}.{}".format(VER_MAJOR, VER_MINOR, VER_MICRO),
+            "InstallPath": {
+                # I have no idea why the trailing spaces are needed, but they seem to be needed.
+                "": "[{AppVPackageRoot}][                    ]",
+                "ExecutablePath": "[{AppVPackageRoot}]python.exe[                    ]",
+                "WindowedExecutablePath": "[{AppVPackageRoot}]pythonw.exe[                    ]",
+            },
+            "Help": {
+                "Main Python Documentation": {
+                    "_condition": lambda ns: ns.include_chm,
+                    "": "[{{AppVPackageRoot}}]Doc\\{}[                    ]".format(
+                        PYTHON_CHM_NAME
+                    ),
+                },
+                "Local Python Documentation": {
+                    "_condition": lambda ns: ns.include_html_doc,
+                    "": "[{AppVPackageRoot}]Doc\\html\\index.html[                    ]",
+                },
+                "Online Python Documentation": {
+                    "": "https://docs.python.org/{}".format(VER_DOT)
+                },
+            },
+            "Idle": {
+                "_condition": lambda ns: ns.include_idle,
+                "": "[{AppVPackageRoot}]Lib\\idlelib\\idle.pyw[                    ]",
+            },
+        }
+    }
+}
+
+
+def get_packagefamilyname(name, publisher_id):
+    class PACKAGE_ID(ctypes.Structure):
+        _fields_ = [
+            ("reserved", ctypes.c_uint32),
+            ("processorArchitecture", ctypes.c_uint32),
+            ("version", ctypes.c_uint64),
+            ("name", ctypes.c_wchar_p),
+            ("publisher", ctypes.c_wchar_p),
+            ("resourceId", ctypes.c_wchar_p),
+            ("publisherId", ctypes.c_wchar_p),
+        ]
+        _pack_ = 4
+
+    pid = PACKAGE_ID(0, 0, 0, name, publisher_id, None, None)
+    result = ctypes.create_unicode_buffer(256)
+    result_len = ctypes.c_uint32(256)
+    r = ctypes.windll.kernel32.PackageFamilyNameFromId(
+        pid, ctypes.byref(result_len), result
+    )
+    if r:
+        raise OSError(r, "failed to get package family name")
+    return result.value[: result_len.value]
+
+
+def _fixup_sccd(ns, sccd, new_hash=None):
+    if not new_hash:
+        return sccd
+
+    NS = dict(s="http://schemas.microsoft.com/appx/2016/sccd")
+    with open(sccd, "rb") as f:
+        xml = ET.parse(f)
+
+    pfn = get_packagefamilyname(APPX_DATA["Name"], APPX_DATA["Publisher"])
+
+    ae = xml.find("s:AuthorizedEntities", NS)
+    ae.clear()
+
+    e = ET.SubElement(ae, ET.QName(NS["s"], "AuthorizedEntity"))
+    e.set("AppPackageFamilyName", pfn)
+    e.set("CertificateSignatureHash", new_hash)
+
+    for e in xml.findall("s:Catalog", NS):
+        e.text = "FFFF"
+
+    sccd = ns.temp / sccd.name
+    sccd.parent.mkdir(parents=True, exist_ok=True)
+    with open(sccd, "wb") as f:
+        xml.write(f, encoding="utf-8")
+
+    return sccd
+
+
+@public
+def get_appx_layout(ns):
+    if not ns.include_appxmanifest:
+        return
+
+    yield "AppxManifest.xml", ns.temp / "AppxManifest.xml"
+    yield "_resources.xml", ns.temp / "_resources.xml"
+    icons = ns.source / "PC" / "icons"
+    yield "_resources/pythonx44.png", icons / "pythonx44.png"
+    yield "_resources/pythonx44$targetsize-44_altform-unplated.png", icons / "pythonx44.png"
+    yield "_resources/pythonx50.png", icons / "pythonx50.png"
+    yield "_resources/pythonx50$targetsize-50_altform-unplated.png", icons / "pythonx50.png"
+    yield "_resources/pythonx150.png", icons / "pythonx150.png"
+    yield "_resources/pythonx150$targetsize-150_altform-unplated.png", icons / "pythonx150.png"
+    yield "_resources/pythonwx44.png", icons / "pythonwx44.png"
+    yield "_resources/pythonwx44$targetsize-44_altform-unplated.png", icons / "pythonwx44.png"
+    yield "_resources/pythonwx150.png", icons / "pythonwx150.png"
+    yield "_resources/pythonwx150$targetsize-150_altform-unplated.png", icons / "pythonwx150.png"
+    sccd = ns.source / SCCD_FILENAME
+    if sccd.is_file():
+        # This should only be set for side-loading purposes.
+        sccd = _fixup_sccd(ns, sccd, os.getenv("APPX_DATA_SHA256"))
+        yield sccd.name, sccd
+
+
+def find_or_add(xml, element, attr=None, always_add=False):
+    if always_add:
+        e = None
+    else:
+        q = element
+        if attr:
+            q += "[@{}='{}']".format(*attr)
+        e = xml.find(q, APPXMANIFEST_NS)
+    if e is None:
+        prefix, _, name = element.partition(":")
+        name = ET.QName(APPXMANIFEST_NS[prefix or ""], name)
+        e = ET.SubElement(xml, name)
+        if attr:
+            e.set(*attr)
+    return e
+
+
+def _get_app(xml, appid):
+    if appid:
+        app = xml.find(
+            "m:Applications/m:Application[@Id='{}']".format(appid), APPXMANIFEST_NS
+        )
+        if app is None:
+            raise LookupError(appid)
+    else:
+        app = xml
+    return app
+
+
+def add_visual(xml, appid, data):
+    app = _get_app(xml, appid)
+    e = find_or_add(app, "uap:VisualElements")
+    for i in data.items():
+        e.set(*i)
+    return e
+
+
+def add_alias(xml, appid, alias, subsystem="windows"):
+    app = _get_app(xml, appid)
+    e = find_or_add(app, "m:Extensions")
+    e = find_or_add(e, "uap5:Extension", ("Category", "windows.appExecutionAlias"))
+    e = find_or_add(e, "uap5:AppExecutionAlias")
+    e.set(ET.QName(APPXMANIFEST_NS["desktop4"], "Subsystem"), subsystem)
+    e = find_or_add(e, "uap5:ExecutionAlias", ("Alias", alias))
+
+
+def add_file_type(xml, appid, name, suffix, parameters='"%1"'):
+    app = _get_app(xml, appid)
+    e = find_or_add(app, "m:Extensions")
+    e = find_or_add(e, "uap3:Extension", ("Category", "windows.fileTypeAssociation"))
+    e = find_or_add(e, "uap3:FileTypeAssociation", ("Name", name))
+    e.set("Parameters", parameters)
+    e = find_or_add(e, "uap:SupportedFileTypes")
+    if isinstance(suffix, str):
+        suffix = [suffix]
+    for s in suffix:
+        ET.SubElement(e, ET.QName(APPXMANIFEST_NS["uap"], "FileType")).text = s
+
+
+def add_application(
+    ns, xml, appid, executable, aliases, visual_element, subsystem, file_types
+):
+    node = xml.find("m:Applications", APPXMANIFEST_NS)
+    suffix = "_d.exe" if ns.debug else ".exe"
+    app = ET.SubElement(
+        node,
+        ET.QName(APPXMANIFEST_NS[""], "Application"),
+        {
+            "Id": appid,
+            "Executable": executable + suffix,
+            "EntryPoint": "Windows.FullTrustApplication",
+            ET.QName(APPXMANIFEST_NS["desktop4"], "SupportsMultipleInstances"): "true",
+        },
+    )
+    if visual_element:
+        add_visual(app, None, visual_element)
+    for alias in aliases:
+        add_alias(app, None, alias + suffix, subsystem)
+    if file_types:
+        add_file_type(app, None, *file_types)
+    return app
+
+
+def _get_registry_entries(ns, root="", d=None):
+    r = root if root else PureWindowsPath("")
+    if d is None:
+        d = REGISTRY
+    for key, value in d.items():
+        if key == "_condition":
+            continue
+        elif isinstance(value, dict):
+            cond = value.get("_condition")
+            if cond and not cond(ns):
+                continue
+            fullkey = r
+            for part in PureWindowsPath(key).parts:
+                fullkey /= part
+                if len(fullkey.parts) > 1:
+                    yield str(fullkey), None, None
+            yield from _get_registry_entries(ns, fullkey, value)
+        elif len(r.parts) > 1:
+            yield str(r), key, value
+
+
+def add_registry_entries(ns, xml):
+    e = find_or_add(xml, "m:Extensions")
+    e = find_or_add(e, "rescap4:Extension")
+    e.set("Category", "windows.classicAppCompatKeys")
+    e.set("EntryPoint", "Windows.FullTrustApplication")
+    e = ET.SubElement(e, ET.QName(APPXMANIFEST_NS["rescap4"], "ClassicAppCompatKeys"))
+    for name, valuename, value in _get_registry_entries(ns):
+        k = ET.SubElement(
+            e, ET.QName(APPXMANIFEST_NS["rescap4"], "ClassicAppCompatKey")
+        )
+        k.set("Name", name)
+        if value:
+            k.set("ValueName", valuename)
+            k.set("Value", value)
+            k.set("ValueType", "REG_SZ")
+
+
+def disable_registry_virtualization(xml):
+    e = find_or_add(xml, "m:Properties")
+    e = find_or_add(e, "desktop6:RegistryWriteVirtualization")
+    e.text = "disabled"
+    e = find_or_add(xml, "m:Capabilities")
+    e = find_or_add(e, "rescap:Capability", ("Name", "unvirtualizedResources"))
+
+
+@public
+def get_appxmanifest(ns):
+    for k, v in APPXMANIFEST_NS.items():
+        ET.register_namespace(k, v)
+    ET.register_namespace("", APPXMANIFEST_NS["m"])
+
+    xml = ET.parse(io.StringIO(APPXMANIFEST_TEMPLATE))
+    NS = APPXMANIFEST_NS
+    QN = ET.QName
+
+    node = xml.find("m:Identity", NS)
+    for k in node.keys():
+        value = APPX_DATA.get(k)
+        if value:
+            node.set(k, value)
+
+    for node in xml.find("m:Properties", NS):
+        value = APPX_DATA.get(node.tag.rpartition("}")[2])
+        if value:
+            node.text = value
+
+    winver = sys.getwindowsversion()[:3]
+    if winver < (10, 0, 17763):
+        winver = 10, 0, 17763
+    find_or_add(xml, "m:Dependencies/m:TargetDeviceFamily").set(
+        "MaxVersionTested", "{}.{}.{}.0".format(*winver)
+    )
+
+    if winver > (10, 0, 17763):
+        disable_registry_virtualization(xml)
+
+    app = add_application(
+        ns,
+        xml,
+        "Python",
+        "python",
+        ["python", "python{}".format(VER_MAJOR), "python{}".format(VER_DOT)],
+        PYTHON_VE_DATA,
+        "console",
+        ("python.file", [".py"]),
+    )
+
+    add_application(
+        ns,
+        xml,
+        "PythonW",
+        "pythonw",
+        ["pythonw", "pythonw{}".format(VER_MAJOR), "pythonw{}".format(VER_DOT)],
+        PYTHONW_VE_DATA,
+        "windows",
+        ("python.windowedfile", [".pyw"]),
+    )
+
+    if ns.include_pip and ns.include_launchers:
+        add_application(
+            ns,
+            xml,
+            "Pip",
+            "pip",
+            ["pip", "pip{}".format(VER_MAJOR), "pip{}".format(VER_DOT)],
+            PIP_VE_DATA,
+            "console",
+            ("python.wheel", [".whl"], 'install "%1"'),
+        )
+
+    if ns.include_idle and ns.include_launchers:
+        add_application(
+            ns,
+            xml,
+            "Idle",
+            "idle",
+            ["idle", "idle{}".format(VER_MAJOR), "idle{}".format(VER_DOT)],
+            IDLE_VE_DATA,
+            "windows",
+            None,
+        )
+
+    if (ns.source / SCCD_FILENAME).is_file():
+        add_registry_entries(ns, xml)
+        node = xml.find("m:Capabilities", NS)
+        node = ET.SubElement(node, QN(NS["uap4"], "CustomCapability"))
+        node.set("Name", "Microsoft.classicAppCompat_8wekyb3d8bbwe")
+
+    buffer = io.BytesIO()
+    xml.write(buffer, encoding="utf-8", xml_declaration=True)
+    return buffer.getbuffer()
+
+
+@public
+def get_resources_xml(ns):
+    return RESOURCES_XML_TEMPLATE.encode("utf-8")
diff --git a/PC/layout/support/catalog.py b/PC/layout/support/catalog.py
new file mode 100644
index 0000000..4312118
--- /dev/null
+++ b/PC/layout/support/catalog.py
@@ -0,0 +1,44 @@
+"""
+File generation for catalog signing non-binary contents.
+"""
+
+__author__ = "Steve Dower <steve.dower@python.org>"
+__version__ = "3.8"
+
+
+import sys
+
+__all__ = ["PYTHON_CAT_NAME", "PYTHON_CDF_NAME"]
+
+
+def public(f):
+    __all__.append(f.__name__)
+    return f
+
+
+PYTHON_CAT_NAME = "python.cat"
+PYTHON_CDF_NAME = "python.cdf"
+
+
+CATALOG_TEMPLATE = r"""[CatalogHeader]
+Name={target.stem}.cat
+ResultDir={target.parent}
+PublicVersion=1
+CatalogVersion=2
+HashAlgorithms=SHA256
+PageHashes=false
+EncodingType=
+
+[CatalogFiles]
+"""
+
+
+def can_sign(file):
+    return file.is_file() and file.stat().st_size
+
+
+@public
+def write_catalog(target, files):
+    with target.open("w", encoding="utf-8") as cat:
+        cat.write(CATALOG_TEMPLATE.format(target=target))
+        cat.writelines("<HASH>{}={}\n".format(n, f) for n, f in files if can_sign(f))
diff --git a/PC/layout/support/constants.py b/PC/layout/support/constants.py
new file mode 100644
index 0000000..88ea410
--- /dev/null
+++ b/PC/layout/support/constants.py
@@ -0,0 +1,28 @@
+"""
+Constants for generating the layout.
+"""
+
+__author__ = "Steve Dower <steve.dower@python.org>"
+__version__ = "3.8"
+
+import struct
+import sys
+
+VER_MAJOR, VER_MINOR, VER_MICRO, VER_FIELD4 = struct.pack(">i", sys.hexversion)
+VER_FIELD3 = VER_MICRO << 8 | VER_FIELD4
+VER_NAME = {"alpha": "a", "beta": "b", "rc": "rc"}.get(
+    sys.version_info.releaselevel, ""
+)
+VER_SERIAL = sys.version_info.serial if VER_NAME else ""
+VER_DOT = "{}.{}".format(VER_MAJOR, VER_MINOR)
+
+PYTHON_DLL_NAME = "python{}{}.dll".format(VER_MAJOR, VER_MINOR)
+PYTHON_STABLE_DLL_NAME = "python{}.dll".format(VER_MAJOR)
+PYTHON_ZIP_NAME = "python{}{}.zip".format(VER_MAJOR, VER_MINOR)
+PYTHON_PTH_NAME = "python{}{}._pth".format(VER_MAJOR, VER_MINOR)
+
+PYTHON_CHM_NAME = "python{}{}{}{}{}.chm".format(
+    VER_MAJOR, VER_MINOR, VER_MICRO, VER_NAME, VER_SERIAL
+)
+
+IS_X64 = sys.maxsize > 2 ** 32
diff --git a/PC/layout/support/distutils.command.bdist_wininst.py b/PC/layout/support/distutils.command.bdist_wininst.py
new file mode 100644
index 0000000..6e9b49f
--- /dev/null
+++ b/PC/layout/support/distutils.command.bdist_wininst.py
@@ -0,0 +1,25 @@
+"""distutils.command.bdist_wininst
+
+Suppress the 'bdist_wininst' command, while still allowing
+setuptools to import it without breaking."""
+
+from distutils.core import Command
+from distutils.errors import DistutilsPlatformError
+
+
+class bdist_wininst(Command):
+    description = "create an executable installer for MS Windows"
+
+    # Marker for tests that we have the unsupported bdist_wininst
+    _unsupported = True
+
+    def initialize_options(self):
+        pass
+
+    def finalize_options(self):
+        pass
+
+    def run(self):
+        raise DistutilsPlatformError(
+            "bdist_wininst is not supported in this Python distribution"
+        )
diff --git a/PC/layout/support/filesets.py b/PC/layout/support/filesets.py
new file mode 100644
index 0000000..47f727c
--- /dev/null
+++ b/PC/layout/support/filesets.py
@@ -0,0 +1,100 @@
+"""
+File sets and globbing helper for make_layout.
+"""
+
+__author__ = "Steve Dower <steve.dower@python.org>"
+__version__ = "3.8"
+
+import os
+
+
+class FileStemSet:
+    def __init__(self, *patterns):
+        self._names = set()
+        self._prefixes = []
+        self._suffixes = []
+        for p in map(os.path.normcase, patterns):
+            if p.endswith("*"):
+                self._prefixes.append(p[:-1])
+            elif p.startswith("*"):
+                self._suffixes.append(p[1:])
+            else:
+                self._names.add(p)
+
+    def _make_name(self, f):
+        return os.path.normcase(f.stem)
+
+    def __contains__(self, f):
+        bn = self._make_name(f)
+        return (
+            bn in self._names
+            or any(map(bn.startswith, self._prefixes))
+            or any(map(bn.endswith, self._suffixes))
+        )
+
+
+class FileNameSet(FileStemSet):
+    def _make_name(self, f):
+        return os.path.normcase(f.name)
+
+
+class FileSuffixSet:
+    def __init__(self, *patterns):
+        self._names = set()
+        self._prefixes = []
+        self._suffixes = []
+        for p in map(os.path.normcase, patterns):
+            if p.startswith("*."):
+                self._names.add(p[1:])
+            elif p.startswith("*"):
+                self._suffixes.append(p[1:])
+            elif p.endswith("*"):
+                self._prefixes.append(p[:-1])
+            elif p.startswith("."):
+                self._names.add(p)
+            else:
+                self._names.add("." + p)
+
+    def _make_name(self, f):
+        return os.path.normcase(f.suffix)
+
+    def __contains__(self, f):
+        bn = self._make_name(f)
+        return (
+            bn in self._names
+            or any(map(bn.startswith, self._prefixes))
+            or any(map(bn.endswith, self._suffixes))
+        )
+
+
+def _rglob(root, pattern, condition):
+    dirs = [root]
+    recurse = pattern[:3] in {"**/", "**\\"}
+    if recurse:
+        pattern = pattern[3:]
+
+    while dirs:
+        d = dirs.pop(0)
+        if recurse:
+            dirs.extend(
+                filter(
+                    condition, (type(root)(f2) for f2 in os.scandir(d) if f2.is_dir())
+                )
+            )
+        yield from (
+            (f.relative_to(root), f)
+            for f in d.glob(pattern)
+            if f.is_file() and condition(f)
+        )
+
+
+def _return_true(f):
+    return True
+
+
+def rglob(root, patterns, condition=None):
+    if isinstance(patterns, tuple):
+        for p in patterns:
+            yield from _rglob(root, p, condition or _return_true)
+    else:
+        yield from _rglob(root, patterns, condition or _return_true)
diff --git a/PC/layout/support/logging.py b/PC/layout/support/logging.py
new file mode 100644
index 0000000..30869b9
--- /dev/null
+++ b/PC/layout/support/logging.py
@@ -0,0 +1,93 @@
+"""
+Logging support for make_layout.
+"""
+
+__author__ = "Steve Dower <steve.dower@python.org>"
+__version__ = "3.8"
+
+import logging
+import sys
+
+__all__ = []
+
+LOG = None
+HAS_ERROR = False
+
+
+def public(f):
+    __all__.append(f.__name__)
+    return f
+
+
+@public
+def configure_logger(ns):
+    global LOG
+    if LOG:
+        return
+
+    LOG = logging.getLogger("make_layout")
+    LOG.level = logging.DEBUG
+
+    if ns.v:
+        s_level = max(logging.ERROR - ns.v * 10, logging.DEBUG)
+        f_level = max(logging.WARNING - ns.v * 10, logging.DEBUG)
+    else:
+        s_level = logging.ERROR
+        f_level = logging.INFO
+
+    handler = logging.StreamHandler(sys.stdout)
+    handler.setFormatter(logging.Formatter("{levelname:8s} {message}", style="{"))
+    handler.setLevel(s_level)
+    LOG.addHandler(handler)
+
+    if ns.log:
+        handler = logging.FileHandler(ns.log, encoding="utf-8", delay=True)
+        handler.setFormatter(
+            logging.Formatter("[{asctime}]{levelname:8s}: {message}", style="{")
+        )
+        handler.setLevel(f_level)
+        LOG.addHandler(handler)
+
+
+class BraceMessage:
+    def __init__(self, fmt, *args, **kwargs):
+        self.fmt = fmt
+        self.args = args
+        self.kwargs = kwargs
+
+    def __str__(self):
+        return self.fmt.format(*self.args, **self.kwargs)
+
+
+@public
+def log_debug(msg, *args, **kwargs):
+    return LOG.debug(BraceMessage(msg, *args, **kwargs))
+
+
+@public
+def log_info(msg, *args, **kwargs):
+    return LOG.info(BraceMessage(msg, *args, **kwargs))
+
+
+@public
+def log_warning(msg, *args, **kwargs):
+    return LOG.warning(BraceMessage(msg, *args, **kwargs))
+
+
+@public
+def log_error(msg, *args, **kwargs):
+    global HAS_ERROR
+    HAS_ERROR = True
+    return LOG.error(BraceMessage(msg, *args, **kwargs))
+
+
+@public
+def log_exception(msg, *args, **kwargs):
+    global HAS_ERROR
+    HAS_ERROR = True
+    return LOG.exception(BraceMessage(msg, *args, **kwargs))
+
+
+@public
+def error_was_logged():
+    return HAS_ERROR
diff --git a/PC/layout/support/options.py b/PC/layout/support/options.py
new file mode 100644
index 0000000..76d9e34
--- /dev/null
+++ b/PC/layout/support/options.py
@@ -0,0 +1,122 @@
+"""
+List of optional components.
+"""
+
+__author__ = "Steve Dower <steve.dower@python.org>"
+__version__ = "3.8"
+
+
+__all__ = []
+
+
+def public(f):
+    __all__.append(f.__name__)
+    return f
+
+
+OPTIONS = {
+    "stable": {"help": "stable ABI stub"},
+    "pip": {"help": "pip"},
+    "distutils": {"help": "distutils"},
+    "tcltk": {"help": "Tcl, Tk and tkinter"},
+    "idle": {"help": "Idle"},
+    "tests": {"help": "test suite"},
+    "tools": {"help": "tools"},
+    "venv": {"help": "venv"},
+    "dev": {"help": "headers and libs"},
+    "symbols": {"help": "symbols"},
+    "bdist-wininst": {"help": "bdist_wininst support"},
+    "underpth": {"help": "a python._pth file", "not-in-all": True},
+    "launchers": {"help": "specific launchers"},
+    "appxmanifest": {"help": "an appxmanifest"},
+    "props": {"help": "a python.props file"},
+    "chm": {"help": "the CHM documentation"},
+    "html-doc": {"help": "the HTML documentation"},
+}
+
+
+PRESETS = {
+    "appx": {
+        "help": "APPX package",
+        "options": [
+            "stable",
+            "pip",
+            "distutils",
+            "tcltk",
+            "idle",
+            "venv",
+            "dev",
+            "launchers",
+            "appxmanifest",
+            # XXX: Disabled for now "precompile",
+        ],
+    },
+    "nuget": {
+        "help": "nuget package",
+        "options": ["stable", "pip", "distutils", "dev", "props"],
+    },
+    "default": {
+        "help": "development kit package",
+        "options": [
+            "stable",
+            "pip",
+            "distutils",
+            "tcltk",
+            "idle",
+            "tests",
+            "tools",
+            "venv",
+            "dev",
+            "symbols",
+            "bdist-wininst",
+            "chm",
+        ],
+    },
+    "embed": {
+        "help": "embeddable package",
+        "options": ["stable", "zip-lib", "flat-dlls", "underpth", "precompile"],
+    },
+}
+
+
+@public
+def get_argparse_options():
+    for opt, info in OPTIONS.items():
+        help = "When specified, includes {}".format(info["help"])
+        if info.get("not-in-all"):
+            help = "{}. Not affected by --include-all".format(help)
+
+        yield "--include-{}".format(opt), help
+
+    for opt, info in PRESETS.items():
+        help = "When specified, includes default options for {}".format(info["help"])
+        yield "--preset-{}".format(opt), help
+
+
+def ns_get(ns, key, default=False):
+    return getattr(ns, key.replace("-", "_"), default)
+
+
+def ns_set(ns, key, value=True):
+    k1 = key.replace("-", "_")
+    k2 = "include_{}".format(k1)
+    if hasattr(ns, k2):
+        setattr(ns, k2, value)
+    elif hasattr(ns, k1):
+        setattr(ns, k1, value)
+    else:
+        raise AttributeError("no argument named '{}'".format(k1))
+
+
+@public
+def update_presets(ns):
+    for preset, info in PRESETS.items():
+        if ns_get(ns, "preset-{}".format(preset)):
+            for opt in info["options"]:
+                ns_set(ns, opt)
+
+    if ns.include_all:
+        for opt in OPTIONS:
+            if OPTIONS[opt].get("not-in-all"):
+                continue
+            ns_set(ns, opt)
diff --git a/PC/layout/support/pip.py b/PC/layout/support/pip.py
new file mode 100644
index 0000000..369a923
--- /dev/null
+++ b/PC/layout/support/pip.py
@@ -0,0 +1,79 @@
+"""
+Extraction and file list generation for pip.
+"""
+
+__author__ = "Steve Dower <steve.dower@python.org>"
+__version__ = "3.8"
+
+
+import os
+import shutil
+import subprocess
+import sys
+
+__all__ = []
+
+
+def public(f):
+    __all__.append(f.__name__)
+    return f
+
+
+@public
+def get_pip_dir(ns):
+    if ns.copy:
+        if ns.zip_lib:
+            return ns.copy / "packages"
+        return ns.copy / "Lib" / "site-packages"
+    else:
+        return ns.temp / "packages"
+
+
+@public
+def extract_pip_files(ns):
+    dest = get_pip_dir(ns)
+    dest.mkdir(parents=True, exist_ok=True)
+
+    src = ns.source / "Lib" / "ensurepip" / "_bundled"
+
+    ns.temp.mkdir(parents=True, exist_ok=True)
+    wheels = [shutil.copy(whl, ns.temp) for whl in src.glob("*.whl")]
+    search_path = os.pathsep.join(wheels)
+    if os.environ.get("PYTHONPATH"):
+        search_path += ";" + os.environ["PYTHONPATH"]
+
+    env = os.environ.copy()
+    env["PYTHONPATH"] = search_path
+
+    output = subprocess.check_output(
+        [
+            sys.executable,
+            "-m",
+            "pip",
+            "--no-color",
+            "install",
+            "pip",
+            "setuptools",
+            "--upgrade",
+            "--target",
+            str(dest),
+            "--no-index",
+            "--no-cache-dir",
+            "-f",
+            str(src),
+            "--only-binary",
+            ":all:",
+        ],
+        env=env,
+    )
+
+    try:
+        shutil.rmtree(dest / "bin")
+    except OSError:
+        pass
+
+    for file in wheels:
+        try:
+            os.remove(file)
+        except OSError:
+            pass
diff --git a/PC/layout/support/props.py b/PC/layout/support/props.py
new file mode 100644
index 0000000..3a047d2
--- /dev/null
+++ b/PC/layout/support/props.py
@@ -0,0 +1,110 @@
+"""
+Provides .props file.
+"""
+
+import os
+
+from .constants import *
+
+__all__ = ["PYTHON_PROPS_NAME"]
+
+
+def public(f):
+    __all__.append(f.__name__)
+    return f
+
+
+PYTHON_PROPS_NAME = "python.props"
+
+PROPS_DATA = {
+    "PYTHON_TAG": VER_DOT,
+    "PYTHON_VERSION": os.getenv("PYTHON_NUSPEC_VERSION"),
+    "PYTHON_PLATFORM": os.getenv("PYTHON_PROPS_PLATFORM"),
+    "PYTHON_TARGET": "",
+}
+
+if not PROPS_DATA["PYTHON_VERSION"]:
+    if VER_NAME:
+        PROPS_DATA["PYTHON_VERSION"] = "{}.{}-{}{}".format(
+            VER_DOT, VER_MICRO, VER_NAME, VER_SERIAL
+        )
+    else:
+        PROPS_DATA["PYTHON_VERSION"] = "{}.{}".format(VER_DOT, VER_MICRO)
+
+if not PROPS_DATA["PYTHON_PLATFORM"]:
+    PROPS_DATA["PYTHON_PLATFORM"] = "x64" if IS_X64 else "Win32"
+
+PROPS_DATA["PYTHON_TARGET"] = "_GetPythonRuntimeFilesDependsOn{}{}_{}".format(
+    VER_MAJOR, VER_MINOR, PROPS_DATA["PYTHON_PLATFORM"]
+)
+
+PROPS_TEMPLATE = r"""<?xml version="1.0" encoding="utf-8"?>
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup Condition="$(Platform) == '{PYTHON_PLATFORM}'">
+    <PythonHome Condition="$(Configuration) == 'Debug'">$([msbuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), "python_d.exe")</PythonHome>
+    <PythonHome Condition="$(PythonHome) == ''">$([msbuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), "python.exe")</PythonHome>
+    <PythonInclude>$(PythonHome)\include</PythonInclude>
+    <PythonLibs>$(PythonHome)\libs</PythonLibs>
+    <PythonTag>{PYTHON_TAG}</PythonTag>
+    <PythonVersion>{PYTHON_VERSION}</PythonVersion>
+
+    <IncludePythonExe Condition="$(IncludePythonExe) == ''">true</IncludePythonExe>
+    <IncludeDistutils Condition="$(IncludeDistutils) == ''">false</IncludeDistutils>
+    <IncludeLib2To3 Condition="$(IncludeLib2To3) == ''">false</IncludeLib2To3>
+    <IncludeVEnv Condition="$(IncludeVEnv) == ''">false</IncludeVEnv>
+
+    <GetPythonRuntimeFilesDependsOn>{PYTHON_TARGET};$(GetPythonRuntimeFilesDependsOn)</GetPythonRuntimeFilesDependsOn>
+  </PropertyGroup>
+
+  <ItemDefinitionGroup Condition="$(Platform) == '{PYTHON_PLATFORM}'">
+    <ClCompile>
+      <AdditionalIncludeDirectories>$(PythonInclude);%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
+    </ClCompile>
+    <Link>
+      <AdditionalLibraryDirectories>$(PythonLibs);%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+    </Link>
+  </ItemDefinitionGroup>
+
+  <Target Name="GetPythonRuntimeFiles" Returns="@(PythonRuntime)" DependsOnTargets="$(GetPythonRuntimeFilesDependsOn)" />
+
+  <Target Name="{PYTHON_TARGET}" Returns="@(PythonRuntime)">
+    <ItemGroup>
+      <_PythonRuntimeExe Include="$(PythonHome)\python*.dll" />
+      <_PythonRuntimeExe Include="$(PythonHome)\python*.exe" Condition="$(IncludePythonExe) == 'true'" />
+      <_PythonRuntimeExe>
+        <Link>%(Filename)%(Extension)</Link>
+      </_PythonRuntimeExe>
+      <_PythonRuntimeDlls Include="$(PythonHome)\DLLs\*.pyd" />
+      <_PythonRuntimeDlls Include="$(PythonHome)\DLLs\*.dll" />
+      <_PythonRuntimeDlls>
+        <Link>DLLs\%(Filename)%(Extension)</Link>
+      </_PythonRuntimeDlls>
+      <_PythonRuntimeLib Include="$(PythonHome)\Lib\**\*" Exclude="$(PythonHome)\Lib\**\*.pyc;$(PythonHome)\Lib\site-packages\**\*" />
+      <_PythonRuntimeLib Remove="$(PythonHome)\Lib\distutils\**\*" Condition="$(IncludeDistutils) != 'true'" />
+      <_PythonRuntimeLib Remove="$(PythonHome)\Lib\lib2to3\**\*" Condition="$(IncludeLib2To3) != 'true'" />
+      <_PythonRuntimeLib Remove="$(PythonHome)\Lib\ensurepip\**\*" Condition="$(IncludeVEnv) != 'true'" />
+      <_PythonRuntimeLib Remove="$(PythonHome)\Lib\venv\**\*" Condition="$(IncludeVEnv) != 'true'" />
+      <_PythonRuntimeLib>
+        <Link>Lib\%(RecursiveDir)%(Filename)%(Extension)</Link>
+      </_PythonRuntimeLib>
+      <PythonRuntime Include="@(_PythonRuntimeExe);@(_PythonRuntimeDlls);@(_PythonRuntimeLib)" />
+    </ItemGroup>
+
+    <Message Importance="low" Text="Collected Python runtime from $(PythonHome):%0D%0A@(PythonRuntime->'  %(Link)','%0D%0A')" />
+  </Target>
+</Project>
+"""
+
+
+@public
+def get_props_layout(ns):
+    if ns.include_all or ns.include_props:
+        yield "python.props", ns.temp / "python.props"
+
+
+@public
+def get_props(ns):
+    # TODO: Filter contents of props file according to included/excluded items
+    props = PROPS_TEMPLATE.format_map(PROPS_DATA)
+    return props.encode("utf-8")
diff --git a/Tools/nuget/python.props b/PC/layout/support/python.props
similarity index 100%
rename from Tools/nuget/python.props
rename to PC/layout/support/python.props
diff --git a/PC/pylauncher.rc b/PC/pylauncher.rc
index 3da3445..92987af 100644
--- a/PC/pylauncher.rc
+++ b/PC/pylauncher.rc
@@ -7,6 +7,11 @@
 #include <winuser.h>
 1 RT_MANIFEST "python.manifest"
 
+#if defined(PY_ICON)
+1 ICON DISCARDABLE "icons\python.ico"
+#elif defined(PYW_ICON)
+1 ICON DISCARDABLE "icons\pythonw.ico"
+#else
 1 ICON DISCARDABLE "icons\launcher.ico" 
 2 ICON DISCARDABLE "icons\py.ico" 
 3 ICON DISCARDABLE "icons\pyc.ico" 
@@ -14,6 +19,7 @@
 5 ICON DISCARDABLE "icons\python.ico"
 6 ICON DISCARDABLE "icons\pythonw.ico"
 7 ICON DISCARDABLE "icons\setup.ico" 
+#endif
 
 /////////////////////////////////////////////////////////////////////////////
 //
diff --git a/PC/python_uwp.cpp b/PC/python_uwp.cpp
new file mode 100644
index 0000000..1658d05
--- /dev/null
+++ b/PC/python_uwp.cpp
@@ -0,0 +1,226 @@
+/* Main program when embedded in a UWP application on Windows */
+
+#include "Python.h"
+#include <string.h>
+
+#define WIN32_LEAN_AND_MEAN
+#include <Windows.h>
+#include <shellapi.h>
+#include <winrt\Windows.ApplicationModel.h>
+#include <winrt\Windows.Storage.h>
+
+#ifdef PYTHONW
+#ifdef _DEBUG
+const wchar_t *PROGNAME = L"pythonw_d.exe";
+#else
+const wchar_t *PROGNAME = L"pythonw.exe";
+#endif
+#else
+#ifdef _DEBUG
+const wchar_t *PROGNAME = L"python_d.exe";
+#else
+const wchar_t *PROGNAME = L"python.exe";
+#endif
+#endif
+
+static void
+set_user_base()
+{
+    wchar_t envBuffer[2048];
+    try {
+        const auto appData = winrt::Windows::Storage::ApplicationData::Current();
+        if (appData) {
+            const auto localCache = appData.LocalCacheFolder();
+            if (localCache) {
+                auto path = localCache.Path();
+                if (!path.empty() &&
+                    !wcscpy_s(envBuffer, path.c_str()) &&
+                    !wcscat_s(envBuffer, L"\\local-packages")
+                ) {
+                    _wputenv_s(L"PYTHONUSERBASE", envBuffer);
+                }
+            }
+        }
+    } catch (...) {
+    }
+}
+
+static const wchar_t *
+get_argv0(const wchar_t *argv0)
+{
+    winrt::hstring installPath;
+    const wchar_t *launcherPath;
+    wchar_t *buffer;
+    size_t len;
+
+    launcherPath = _wgetenv(L"__PYVENV_LAUNCHER__");
+    if (launcherPath && launcherPath[0]) {
+        len = wcslen(launcherPath) + 1;
+        buffer = (wchar_t *)malloc(sizeof(wchar_t) * len);
+        if (!buffer) {
+            Py_FatalError("out of memory");
+            return NULL;
+        }
+        if (wcscpy_s(buffer, len, launcherPath)) {
+            Py_FatalError("failed to copy to buffer");
+            return NULL;
+        }
+        return buffer;
+    }
+
+    try {
+        const auto package = winrt::Windows::ApplicationModel::Package::Current();
+        if (package) {
+            const auto install = package.InstalledLocation();
+            if (install) {
+                installPath = install.Path();
+            }
+        }
+    }
+    catch (...) {
+    }
+
+    if (!installPath.empty()) {
+        len = installPath.size() + wcslen(PROGNAME) + 2;
+    } else {
+        len = wcslen(argv0) + wcslen(PROGNAME) + 1;
+    }
+
+    buffer = (wchar_t *)malloc(sizeof(wchar_t) * len);
+    if (!buffer) {
+        Py_FatalError("out of memory");
+        return NULL;
+    }
+
+    if (!installPath.empty()) {
+        if (wcscpy_s(buffer, len, installPath.c_str())) {
+            Py_FatalError("failed to copy to buffer");
+            return NULL;
+        }
+        if (wcscat_s(buffer, len, L"\\")) {
+            Py_FatalError("failed to concatenate backslash");
+            return NULL;
+        }
+    } else {
+        if (wcscpy_s(buffer, len, argv0)) {
+            Py_FatalError("failed to copy argv[0]");
+            return NULL;
+        }
+
+        wchar_t *name = wcsrchr(buffer, L'\\');
+        if (name) {
+            name[1] = L'\0';
+        } else {
+            buffer[0] = L'\0';
+        }
+    }
+
+    if (wcscat_s(buffer, len, PROGNAME)) {
+        Py_FatalError("failed to concatenate program name");
+        return NULL;
+    }
+
+    return buffer;
+}
+
+static wchar_t *
+get_process_name()
+{
+    DWORD bufferLen = MAX_PATH;
+    DWORD len = bufferLen;
+    wchar_t *r = NULL;
+
+    while (!r) {
+        r = (wchar_t *)malloc(bufferLen * sizeof(wchar_t));
+        if (!r) {
+            Py_FatalError("out of memory");
+            return NULL;
+        }
+        len = GetModuleFileNameW(NULL, r, bufferLen);
+        if (len == 0) {
+            free((void *)r);
+            return NULL;
+        } else if (len == bufferLen &&
+                   GetLastError() == ERROR_INSUFFICIENT_BUFFER) {
+            free(r);
+            r = NULL;
+            bufferLen *= 2;
+        }
+    }
+
+    return r;
+}
+
+int
+wmain(int argc, wchar_t **argv)
+{
+    const wchar_t **new_argv;
+    int new_argc;
+    const wchar_t *exeName;
+
+    new_argc = argc;
+    new_argv = (const wchar_t**)malloc(sizeof(wchar_t *) * (argc + 2));
+    if (new_argv == NULL) {
+        Py_FatalError("out of memory");
+        return -1;
+    }
+
+    exeName = get_process_name();
+
+    new_argv[0] = get_argv0(exeName ? exeName : argv[0]);
+    for (int i = 1; i < argc; ++i) {
+        new_argv[i] = argv[i];
+    }
+
+    set_user_base();
+
+    if (exeName) {
+        const wchar_t *p = wcsrchr(exeName, L'\\');
+        if (p) {
+            const wchar_t *moduleName = NULL;
+            if (*p++ == L'\\') {
+                if (wcsnicmp(p, L"pip", 3) == 0) {
+                    moduleName = L"pip";
+                    _wputenv_s(L"PIP_USER", L"true");
+                }
+                else if (wcsnicmp(p, L"idle", 4) == 0) {
+                    moduleName = L"idlelib";
+                }
+            }
+
+            if (moduleName) {
+                new_argc += 2;
+                for (int i = argc; i >= 1; --i) {
+                    new_argv[i + 2] = new_argv[i];
+                }
+                new_argv[1] = L"-m";
+                new_argv[2] = moduleName;
+            }
+        }
+    }
+
+    /* Override program_full_path from here so that
+       sys.executable is set correctly. */
+    _Py_SetProgramFullPath(new_argv[0]);
+
+    int result = Py_Main(new_argc, (wchar_t **)new_argv);
+
+    free((void *)exeName);
+    free((void *)new_argv);
+
+    return result;
+}
+
+#ifdef PYTHONW
+
+int WINAPI wWinMain(
+    HINSTANCE hInstance,      /* handle to current instance */
+    HINSTANCE hPrevInstance,  /* handle to previous instance */
+    LPWSTR lpCmdLine,         /* pointer to command line */
+    int nCmdShow              /* show state of window */
+)
+{
+    return wmain(__argc, __wargv);
+}
+
+#endif
diff --git a/PC/store_info.txt b/PC/store_info.txt
new file mode 100644
index 0000000..e252692
--- /dev/null
+++ b/PC/store_info.txt
@@ -0,0 +1,146 @@
+# Overview
+
+NOTE: This file requires more content.
+
+Since Python 3.7.2, releases have been made through the Microsoft Store
+to allow easy installation on Windows 10.0.17763.0 and later.
+
+# Building
+
+To build the store package, the PC/layout script should be used.
+Execute the directory with the build of Python to package, and pass
+"-h" for full command-line options.
+
+To sideload test builds, you will need a local certificate.
+Instructions are available at
+https://docs.microsoft.com/windows/uwp/packaging/create-certificate-package-signing.
+
+After exporting your certificate, you will need the subject name and
+SHA256 hash. The `certutil -dump <cert file>` command will display this
+information.
+
+To build for sideloading, use these commands in PowerShell:
+
+```
+$env:APPX_DATA_PUBLISHER=<your certificate subject name>
+$env:APPX_DATA_SHA256=<your certificate SHA256>
+$env:SigningCertificateFile=<your certificate file>
+
+python PC/layout --copy <layout directory> --include-appxmanifest
+Tools/msi/make_appx.ps1 <layout directory> python.msix -sign
+
+Add-AppxPackage python.msix
+```
+
+(Note that only the last command requires PowerShell, and the others
+can be used from Command Prompt. You can also double-click to install
+the final package.)
+
+To build for publishing to the Store, use these commands:
+
+```
+$env:APPX_DATA_PUBLISHER = $null
+$env:APPX_DATA_SHA256 = $null
+
+python PC/layout --copy <layout directory> --preset-appxmanifest --precompile
+Tools/msi/make_appx.ps1 <layout directory> python.msix
+```
+
+Note that this package cannot be installed locally. It may only be
+added to a submission for the store.
+
+
+# Submission Metadata
+
+This file contains the text that we use to fill out the store listing
+for the Microsoft Store. It needs to be entered manually when creating
+a new submission via the dashboard at
+https://partner.microsoft.com/dashboard.
+
+We keep it here for convenience and to allow it to be updated via pull
+requests.
+
+## Title
+
+Python 3.7
+
+## Short Title
+
+Python
+
+## Description
+
+Python is an easy to learn, powerful programming language. It has efficient high-level data structures and a simple but effective approach to object-oriented programming. Python’s elegant syntax and dynamic typing, together with its interpreted nature, make it an ideal language for scripting and rapid application development in many areas on most platforms.
+
+The Python interpreter and the extensive standard library are freely available in source or binary form for all major platforms from the Python Web site, https://www.python.org/, and may be freely distributed. The same site also contains distributions of and pointers to many free third party Python modules, programs and tools, and additional documentation.
+
+The Python interpreter is easily extended with new functions and data types implemented in C or C++ (or other languages callable from C). Python is also suitable as an extension language for customizable applications.
+
+## ShortDescription
+
+The Python 3.7 interpreter and runtime.
+
+## Copyright Trademark Information
+
+(c) Python Software Foundation
+
+## Additional License Terms
+
+Visit https://docs.python.org/3.7/license.html for latest license terms.
+
+PSF LICENSE AGREEMENT FOR PYTHON 3.7
+
+1. This LICENSE AGREEMENT is between the Python Software Foundation ("PSF"), and
+   the Individual or Organization ("Licensee") accessing and otherwise using Python
+   3.7 software in source or binary form and its associated documentation.
+
+2. Subject to the terms and conditions of this License Agreement, PSF hereby
+   grants Licensee a nonexclusive, royalty-free, world-wide license to reproduce,
+   analyze, test, perform and/or display publicly, prepare derivative works,
+   distribute, and otherwise use Python 3.7 alone or in any derivative
+   version, provided, however, that PSF's License Agreement and PSF's notice of
+   copyright, i.e., "Copyright © 2001-2018 Python Software Foundation; All Rights
+   Reserved" are retained in Python 3.7 alone or in any derivative version
+   prepared by Licensee.
+
+3. In the event Licensee prepares a derivative work that is based on or
+   incorporates Python 3.7 or any part thereof, and wants to make the
+   derivative work available to others as provided herein, then Licensee hereby
+   agrees to include in any such work a brief summary of the changes made to Python
+   3.7.
+
+4. PSF is making Python 3.7 available to Licensee on an "AS IS" basis.
+   PSF MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED.  BY WAY OF
+   EXAMPLE, BUT NOT LIMITATION, PSF MAKES NO AND DISCLAIMS ANY REPRESENTATION OR
+   WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE OR THAT THE
+   USE OF PYTHON 3.7 WILL NOT INFRINGE ANY THIRD PARTY RIGHTS.
+
+5. PSF SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF PYTHON 3.7
+   FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS A RESULT OF
+   MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON 3.7, OR ANY DERIVATIVE
+   THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF.
+
+6. This License Agreement will automatically terminate upon a material breach of
+   its terms and conditions.
+
+7. Nothing in this License Agreement shall be deemed to create any relationship
+   of agency, partnership, or joint venture between PSF and Licensee.  This License
+   Agreement does not grant permission to use PSF trademarks or trade name in a
+   trademark sense to endorse or promote products or services of Licensee, or any
+   third party.
+
+8. By copying, installing or otherwise using Python 3.7, Licensee agrees
+   to be bound by the terms and conditions of this License Agreement.
+
+## Features
+
+* Easy to install Python runtime
+* Supported by core CPython team
+* Find Python, Pip and Idle on PATH
+
+## Search Terms
+
+* Python
+* Scripting
+* Interpreter
+
diff --git a/PCbuild/_tkinter.vcxproj b/PCbuild/_tkinter.vcxproj
index 95e3cd5..bd61c0d 100644
--- a/PCbuild/_tkinter.vcxproj
+++ b/PCbuild/_tkinter.vcxproj
@@ -95,4 +95,10 @@
   <Target Name="_CleanTclTkDLL" BeforeTargets="Clean">
     <Delete Files="@(_TclTkDLL->'$(OutDir)%(Filename)%(Extension)')" />
   </Target>
+  <Target Name="_WriteTCL_LIBRARY" Outputs="$(OutDir)TCL_LIBRARY.env" AfterTargets="Build">
+    <WriteLinesToFile File="$(OutDir)TCL_LIBRARY.env" Lines="$(tcltkdir)\lib\tcl$(TclMajorVersion).$(TclMinorVersion)" Encoding="utf-8" Overwrite="true" />
+  </Target>
+  <Target Name="_CleanTCL_LIBRARY" BeforeTargets="Clean">
+    <Delete Files="$(OutDir)TCL_LIBRARY.env" />
+  </Target>
 </Project>
\ No newline at end of file
diff --git a/PCbuild/find_msbuild.bat b/PCbuild/find_msbuild.bat
index 57512a0..a2810f0 100644
--- a/PCbuild/find_msbuild.bat
+++ b/PCbuild/find_msbuild.bat
@@ -29,6 +29,16 @@
 @where msbuild > "%TEMP%\msbuild.loc" 2> nul && set /P MSBUILD= < "%TEMP%\msbuild.loc" & del "%TEMP%\msbuild.loc"
 @if exist "%MSBUILD%" set MSBUILD="%MSBUILD%" & (set _Py_MSBuild_Source=PATH) & goto :found
 
+@rem VS 2017 and later provide vswhere.exe, which can be used
+@if not exist "%ProgramFiles(x86)%\Microsoft Visual Studio\Installer\vswhere.exe" goto :skip_vswhere
+@set _Py_MSBuild_Root=
+@for /F "tokens=*" %%i in ('"%ProgramFiles(x86)%\Microsoft Visual Studio\Installer\vswhere.exe" -property installationPath -latest') DO @(set _Py_MSBuild_Root=%%i\MSBuild)
+@if not defined _Py_MSBuild_Root goto :skip_vswhere
+@for %%j in (Current 15.0) DO @if exist "%_Py_MSBuild_Root%\%%j\Bin\msbuild.exe" (set MSBUILD="%_Py_MSBuild_Root%\%%j\Bin\msbuild.exe")
+@set _Py_MSBuild_Root=
+@if defined MSBUILD @if exist %MSBUILD% (set _Py_MSBuild_Source=Visual Studio installation) & goto :found
+:skip_vswhere
+
 @rem VS 2017 sets exactly one install as the "main" install, so we may find MSBuild in there.
 @reg query "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\SxS\VS7" /v 15.0 /reg:32 >nul 2>nul
 @if NOT ERRORLEVEL 1 @for /F "tokens=1,2*" %%i in ('reg query "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\SxS\VS7" /v 15.0 /reg:32') DO @(
diff --git a/PCbuild/pcbuild.proj b/PCbuild/pcbuild.proj
index 9e103e1..6bf1667 100644
--- a/PCbuild/pcbuild.proj
+++ b/PCbuild/pcbuild.proj
@@ -52,6 +52,8 @@
     <ExtensionModules Include="_asyncio;_contextvars;_ctypes;_decimal;_elementtree;_msi;_multiprocessing;_overlapped;pyexpat;_queue;select;unicodedata;winsound" />
     <!-- Extension modules that require external sources -->
     <ExternalModules Include="_bz2;_lzma;_sqlite3" />
+    <!-- venv launchers -->
+    <Projects Include="venvlauncher.vcxproj;venvwlauncher.vcxproj" />
     <!-- _ssl will build _socket as well, which may cause conflicts in parallel builds -->
     <ExtensionModules Include="_socket" Condition="!$(IncludeSSL) or !$(IncludeExternals)" />
     <ExternalModules Include="_ssl;_hashlib" Condition="$(IncludeSSL)" />
@@ -70,6 +72,7 @@
     <Projects2 Include="_freeze_importlib.vcxproj" />
     <!-- python[w].exe -->
     <Projects2 Include="python.vcxproj;pythonw.vcxproj" />
+    <Projects2 Include="python_uwp.vcxproj;pythonw_uwp.vcxproj" />
   </ItemGroup>
 
   <Target Name="Build">
diff --git a/PCbuild/pcbuild.sln b/PCbuild/pcbuild.sln
index 59b3861..c212d9f 100644
--- a/PCbuild/pcbuild.sln
+++ b/PCbuild/pcbuild.sln
@@ -93,6 +93,14 @@
 EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "liblzma", "liblzma.vcxproj", "{12728250-16EC-4DC6-94D7-E21DD88947F8}"
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "python_uwp", "python_uwp.vcxproj", "{9DE9E23D-C8D4-4817-92A9-920A8B1FE5FF}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "venvlauncher", "venvlauncher.vcxproj", "{494BAC80-A60C-43A9-99E7-ACB691CE2C4D}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "venvwlauncher", "venvwlauncher.vcxproj", "{FDB84CBB-2FB6-47C8-A2D6-091E0833239D}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "pythonw_uwp", "pythonw_uwp.vcxproj", "{AB603547-1E2A-45B3-9E09-B04596006393}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Win32 = Debug|Win32
@@ -693,6 +701,70 @@
 		{12728250-16EC-4DC6-94D7-E21DD88947F8}.Release|Win32.Build.0 = Release|Win32
 		{12728250-16EC-4DC6-94D7-E21DD88947F8}.Release|x64.ActiveCfg = Release|x64
 		{12728250-16EC-4DC6-94D7-E21DD88947F8}.Release|x64.Build.0 = Release|x64
+		{9DE9E23D-C8D4-4817-92A9-920A8B1FE5FF}.Debug|Win32.ActiveCfg = Debug|Win32
+		{9DE9E23D-C8D4-4817-92A9-920A8B1FE5FF}.Debug|Win32.Build.0 = Debug|Win32
+		{9DE9E23D-C8D4-4817-92A9-920A8B1FE5FF}.Debug|x64.ActiveCfg = Debug|x64
+		{9DE9E23D-C8D4-4817-92A9-920A8B1FE5FF}.Debug|x64.Build.0 = Debug|x64
+		{9DE9E23D-C8D4-4817-92A9-920A8B1FE5FF}.PGInstrument|Win32.ActiveCfg = PGInstrument|Win32
+		{9DE9E23D-C8D4-4817-92A9-920A8B1FE5FF}.PGInstrument|Win32.Build.0 = PGInstrument|Win32
+		{9DE9E23D-C8D4-4817-92A9-920A8B1FE5FF}.PGInstrument|x64.ActiveCfg = PGInstrument|x64
+		{9DE9E23D-C8D4-4817-92A9-920A8B1FE5FF}.PGInstrument|x64.Build.0 = PGInstrument|x64
+		{9DE9E23D-C8D4-4817-92A9-920A8B1FE5FF}.PGUpdate|Win32.ActiveCfg = PGUpdate|Win32
+		{9DE9E23D-C8D4-4817-92A9-920A8B1FE5FF}.PGUpdate|Win32.Build.0 = PGUpdate|Win32
+		{9DE9E23D-C8D4-4817-92A9-920A8B1FE5FF}.PGUpdate|x64.ActiveCfg = PGUpdate|x64
+		{9DE9E23D-C8D4-4817-92A9-920A8B1FE5FF}.PGUpdate|x64.Build.0 = PGUpdate|x64
+		{9DE9E23D-C8D4-4817-92A9-920A8B1FE5FF}.Release|Win32.ActiveCfg = Release|Win32
+		{9DE9E23D-C8D4-4817-92A9-920A8B1FE5FF}.Release|Win32.Build.0 = Release|Win32
+		{9DE9E23D-C8D4-4817-92A9-920A8B1FE5FF}.Release|x64.ActiveCfg = Release|x64
+		{9DE9E23D-C8D4-4817-92A9-920A8B1FE5FF}.Release|x64.Build.0 = Release|x64
+		{494BAC80-A60C-43A9-99E7-ACB691CE2C4D}.Debug|Win32.ActiveCfg = Debug|Win32
+		{494BAC80-A60C-43A9-99E7-ACB691CE2C4D}.Debug|Win32.Build.0 = Debug|Win32
+		{494BAC80-A60C-43A9-99E7-ACB691CE2C4D}.Debug|x64.ActiveCfg = Debug|x64
+		{494BAC80-A60C-43A9-99E7-ACB691CE2C4D}.Debug|x64.Build.0 = Debug|x64
+		{494BAC80-A60C-43A9-99E7-ACB691CE2C4D}.PGInstrument|Win32.ActiveCfg = PGInstrument|Win32
+		{494BAC80-A60C-43A9-99E7-ACB691CE2C4D}.PGInstrument|Win32.Build.0 = PGInstrument|Win32
+		{494BAC80-A60C-43A9-99E7-ACB691CE2C4D}.PGInstrument|x64.ActiveCfg = PGInstrument|x64
+		{494BAC80-A60C-43A9-99E7-ACB691CE2C4D}.PGInstrument|x64.Build.0 = PGInstrument|x64
+		{494BAC80-A60C-43A9-99E7-ACB691CE2C4D}.PGUpdate|Win32.ActiveCfg = PGUpdate|Win32
+		{494BAC80-A60C-43A9-99E7-ACB691CE2C4D}.PGUpdate|Win32.Build.0 = PGUpdate|Win32
+		{494BAC80-A60C-43A9-99E7-ACB691CE2C4D}.PGUpdate|x64.ActiveCfg = PGUpdate|x64
+		{494BAC80-A60C-43A9-99E7-ACB691CE2C4D}.PGUpdate|x64.Build.0 = PGUpdate|x64
+		{494BAC80-A60C-43A9-99E7-ACB691CE2C4D}.Release|Win32.ActiveCfg = Release|Win32
+		{494BAC80-A60C-43A9-99E7-ACB691CE2C4D}.Release|Win32.Build.0 = Release|Win32
+		{494BAC80-A60C-43A9-99E7-ACB691CE2C4D}.Release|x64.ActiveCfg = Release|x64
+		{494BAC80-A60C-43A9-99E7-ACB691CE2C4D}.Release|x64.Build.0 = Release|x64
+		{FDB84CBB-2FB6-47C8-A2D6-091E0833239D}.Debug|Win32.ActiveCfg = Debug|Win32
+		{FDB84CBB-2FB6-47C8-A2D6-091E0833239D}.Debug|Win32.Build.0 = Debug|Win32
+		{FDB84CBB-2FB6-47C8-A2D6-091E0833239D}.Debug|x64.ActiveCfg = Debug|x64
+		{FDB84CBB-2FB6-47C8-A2D6-091E0833239D}.Debug|x64.Build.0 = Debug|x64
+		{FDB84CBB-2FB6-47C8-A2D6-091E0833239D}.PGInstrument|Win32.ActiveCfg = PGInstrument|Win32
+		{FDB84CBB-2FB6-47C8-A2D6-091E0833239D}.PGInstrument|Win32.Build.0 = PGInstrument|Win32
+		{FDB84CBB-2FB6-47C8-A2D6-091E0833239D}.PGInstrument|x64.ActiveCfg = PGInstrument|x64
+		{FDB84CBB-2FB6-47C8-A2D6-091E0833239D}.PGInstrument|x64.Build.0 = PGInstrument|x64
+		{FDB84CBB-2FB6-47C8-A2D6-091E0833239D}.PGUpdate|Win32.ActiveCfg = PGUpdate|Win32
+		{FDB84CBB-2FB6-47C8-A2D6-091E0833239D}.PGUpdate|Win32.Build.0 = PGUpdate|Win32
+		{FDB84CBB-2FB6-47C8-A2D6-091E0833239D}.PGUpdate|x64.ActiveCfg = PGUpdate|x64
+		{FDB84CBB-2FB6-47C8-A2D6-091E0833239D}.PGUpdate|x64.Build.0 = PGUpdate|x64
+		{FDB84CBB-2FB6-47C8-A2D6-091E0833239D}.Release|Win32.ActiveCfg = Release|Win32
+		{FDB84CBB-2FB6-47C8-A2D6-091E0833239D}.Release|Win32.Build.0 = Release|Win32
+		{FDB84CBB-2FB6-47C8-A2D6-091E0833239D}.Release|x64.ActiveCfg = Release|x64
+		{FDB84CBB-2FB6-47C8-A2D6-091E0833239D}.Release|x64.Build.0 = Release|x64
+		{AB603547-1E2A-45B3-9E09-B04596006393}.Debug|Win32.ActiveCfg = Debug|Win32
+		{AB603547-1E2A-45B3-9E09-B04596006393}.Debug|Win32.Build.0 = Debug|Win32
+		{AB603547-1E2A-45B3-9E09-B04596006393}.Debug|x64.ActiveCfg = Debug|x64
+		{AB603547-1E2A-45B3-9E09-B04596006393}.Debug|x64.Build.0 = Debug|x64
+		{AB603547-1E2A-45B3-9E09-B04596006393}.PGInstrument|Win32.ActiveCfg = PGInstrument|Win32
+		{AB603547-1E2A-45B3-9E09-B04596006393}.PGInstrument|Win32.Build.0 = PGInstrument|Win32
+		{AB603547-1E2A-45B3-9E09-B04596006393}.PGInstrument|x64.ActiveCfg = PGInstrument|x64
+		{AB603547-1E2A-45B3-9E09-B04596006393}.PGInstrument|x64.Build.0 = PGInstrument|x64
+		{AB603547-1E2A-45B3-9E09-B04596006393}.PGUpdate|Win32.ActiveCfg = PGUpdate|Win32
+		{AB603547-1E2A-45B3-9E09-B04596006393}.PGUpdate|Win32.Build.0 = PGUpdate|Win32
+		{AB603547-1E2A-45B3-9E09-B04596006393}.PGUpdate|x64.ActiveCfg = PGUpdate|x64
+		{AB603547-1E2A-45B3-9E09-B04596006393}.PGUpdate|x64.Build.0 = PGUpdate|x64
+		{AB603547-1E2A-45B3-9E09-B04596006393}.Release|Win32.ActiveCfg = Release|Win32
+		{AB603547-1E2A-45B3-9E09-B04596006393}.Release|Win32.Build.0 = Release|Win32
+		{AB603547-1E2A-45B3-9E09-B04596006393}.Release|x64.ActiveCfg = Release|x64
+		{AB603547-1E2A-45B3-9E09-B04596006393}.Release|x64.Build.0 = Release|x64
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
diff --git a/PCbuild/python.props b/PCbuild/python.props
index 09f11d3..6dbb503 100644
--- a/PCbuild/python.props
+++ b/PCbuild/python.props
@@ -77,7 +77,8 @@
     -->
     <_RegistryVersion>$(Registry:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SDKs\Windows\v10.0@ProductVersion)</_RegistryVersion>
     <_RegistryVersion Condition="$(_RegistryVersion) == ''">$(Registry:HKEY_LOCAL_MACHINE\WOW6432Node\SOFTWARE\Microsoft\Microsoft SDKs\Windows\v10.0@ProductVersion)</_RegistryVersion>
-    <DefaultWindowsSDKVersion>10.0.17134.0</DefaultWindowsSDKVersion>
+    <DefaultWindowsSDKVersion>10.0.17763.0</DefaultWindowsSDKVersion>
+    <DefaultWindowsSDKVersion Condition="$(_RegistryVersion) == '10.0.17134'">10.0.17134.0</DefaultWindowsSDKVersion>
     <DefaultWindowsSDKVersion Condition="$(_RegistryVersion) == '10.0.16299'">10.0.16299.0</DefaultWindowsSDKVersion>
     <DefaultWindowsSDKVersion Condition="$(_RegistryVersion) == '10.0.15063'">10.0.15063.0</DefaultWindowsSDKVersion>
     <DefaultWindowsSDKVersion Condition="$(_RegistryVersion) == '10.0.14393'">10.0.14393.0</DefaultWindowsSDKVersion>
diff --git a/PCbuild/python_uwp.vcxproj b/PCbuild/python_uwp.vcxproj
new file mode 100644
index 0000000..af187dd
--- /dev/null
+++ b/PCbuild/python_uwp.vcxproj
@@ -0,0 +1,86 @@
+﻿<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="PGInstrument|Win32">
+      <Configuration>PGInstrument</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="PGInstrument|x64">
+      <Configuration>PGInstrument</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="PGUpdate|Win32">
+      <Configuration>PGUpdate</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="PGUpdate|x64">
+      <Configuration>PGUpdate</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{9DE9E23D-C8D4-4817-92A9-920A8B1FE5FF}</ProjectGuid>
+  </PropertyGroup>
+  <Import Project="python.props" />
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseOfMfc>false</UseOfMfc>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="pyproject.props" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup>
+    <_ProjectFileVersion>10.0.30319.1</_ProjectFileVersion>
+  </PropertyGroup>
+  <ItemDefinitionGroup>
+    <ClCompile>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalOptions>/EHsc /std:c++17 %(AdditionalOptions)</AdditionalOptions>
+    </ClCompile>
+    <Link>
+      <AdditionalDependencies>windowsapp.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <SubSystem>Console</SubSystem>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <None Include="..\PC\pycon.ico" />
+  </ItemGroup>
+  <ItemGroup>
+    <ResourceCompile Include="..\PC\python_exe.rc" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="..\PC\python_uwp.cpp" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="pythoncore.vcxproj">
+      <Project>{cf7ac3d1-e2df-41d2-bea6-1e2556cdea26}</Project>
+      <ReferenceOutputAssembly>false</ReferenceOutputAssembly>
+    </ProjectReference>
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
diff --git a/PCbuild/pythoncore.vcxproj b/PCbuild/pythoncore.vcxproj
index d19b5f5..2ee8822 100644
--- a/PCbuild/pythoncore.vcxproj
+++ b/PCbuild/pythoncore.vcxproj
@@ -460,4 +460,19 @@
   <Target Name="_WarnAboutZlib" BeforeTargets="PrepareForBuild" Condition="!$(IncludeExternals)">
     <Warning Text="Not including zlib is not a supported configuration." />
   </Target>
+
+  <PropertyGroup>
+    <VCRedistDir>$(VCInstallDir)\Redist\MSVC\$(VCToolsRedistVersion)\</VCRedistDir>
+    <VCRedistDir Condition="$(Platform) == 'Win32'">$(VCRedistDir)x86\</VCRedistDir>
+    <VCRedistDir Condition="$(Platform) != 'Win32'">$(VCRedistDir)$(Platform)\</VCRedistDir>
+  </PropertyGroup>
+  <ItemGroup Condition="$(VCInstallDir) != ''">
+    <VCRuntimeDLL Include="$(VCRedistDir)\**\vcruntime*.dll" />
+  </ItemGroup>
+  <Target Name="_CopyVCRuntime" AfterTargets="Build" Inputs="@(VCRuntimeDLL)" Outputs="$(OutDir)%(Filename)%(Extension)">
+    <Copy SourceFiles="%(VCRuntimeDLL.FullPath)" DestinationFolder="$(OutDir)" />
+  </Target>
+  <Target Name="_CleanVCRuntime" AfterTargets="Clean">
+    <Delete Files="@(VCRuntimeDLL->'$(OutDir)%(Filename)%(Extension)')" />
+  </Target>
 </Project>
diff --git a/PCbuild/pythonw_uwp.vcxproj b/PCbuild/pythonw_uwp.vcxproj
new file mode 100644
index 0000000..79e1058
--- /dev/null
+++ b/PCbuild/pythonw_uwp.vcxproj
@@ -0,0 +1,86 @@
+﻿<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="PGInstrument|Win32">
+      <Configuration>PGInstrument</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="PGInstrument|x64">
+      <Configuration>PGInstrument</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="PGUpdate|Win32">
+      <Configuration>PGUpdate</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="PGUpdate|x64">
+      <Configuration>PGUpdate</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{AB603547-1E2A-45B3-9E09-B04596006393}</ProjectGuid>
+  </PropertyGroup>
+  <Import Project="python.props" />
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseOfMfc>false</UseOfMfc>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="pyproject.props" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup>
+    <_ProjectFileVersion>10.0.30319.1</_ProjectFileVersion>
+  </PropertyGroup>
+  <ItemDefinitionGroup>
+    <ClCompile>
+      <PreprocessorDefinitions>PYTHONW;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalOptions>/EHsc /std:c++17 %(AdditionalOptions)</AdditionalOptions>
+    </ClCompile>
+    <Link>
+      <AdditionalDependencies>windowsapp.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <SubSystem>Windows</SubSystem>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <None Include="..\PC\pyconw.ico" />
+  </ItemGroup>
+  <ItemGroup>
+    <ResourceCompile Include="..\PC\pythonw_exe.rc" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="..\PC\python_uwp.cpp" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="pythoncore.vcxproj">
+      <Project>{cf7ac3d1-e2df-41d2-bea6-1e2556cdea26}</Project>
+      <ReferenceOutputAssembly>false</ReferenceOutputAssembly>
+    </ProjectReference>
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
diff --git a/PCbuild/venvlauncher.vcxproj b/PCbuild/venvlauncher.vcxproj
new file mode 100644
index 0000000..295b363
--- /dev/null
+++ b/PCbuild/venvlauncher.vcxproj
@@ -0,0 +1,85 @@
+﻿<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="PGInstrument|Win32">
+      <Configuration>PGInstrument</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="PGInstrument|x64">
+      <Configuration>PGInstrument</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="PGUpdate|Win32">
+      <Configuration>PGUpdate</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="PGUpdate|x64">
+      <Configuration>PGUpdate</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{494BAC80-A60C-43A9-99E7-ACB691CE2C4D}</ProjectGuid>
+    <RootNamespace>venvlauncher</RootNamespace>
+    <TargetName>venvlauncher</TargetName>
+    <SupportPGO>false</SupportPGO>
+  </PropertyGroup>
+  <Import Project="python.props" />
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <CharacterSet>MultiByte</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <PropertyGroup>
+    <MakeVersionInfoBeforeTarget>ClCompile</MakeVersionInfoBeforeTarget>
+  </PropertyGroup>
+  <ImportGroup Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="pyproject.props" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <ItemDefinitionGroup>
+    <ClCompile>
+      <PreprocessorDefinitions>_CONSOLE;VENV_REDIRECT;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+    </ClCompile>
+    <ResourceCompile>
+      <PreprocessorDefinitions>PY_ICON;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+    </ResourceCompile>
+    <Link>
+      <AdditionalDependencies>version.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <SubSystem>Console</SubSystem>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="..\PC\launcher.c" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="..\PC\launcher.ico" />
+  </ItemGroup>
+  <ItemGroup>
+    <ResourceCompile Include="..\PC\pylauncher.rc" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
diff --git a/PCbuild/venvwlauncher.vcxproj b/PCbuild/venvwlauncher.vcxproj
new file mode 100644
index 0000000..e7ba25d
--- /dev/null
+++ b/PCbuild/venvwlauncher.vcxproj
@@ -0,0 +1,85 @@
+﻿<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="PGInstrument|Win32">
+      <Configuration>PGInstrument</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="PGInstrument|x64">
+      <Configuration>PGInstrument</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="PGUpdate|Win32">
+      <Configuration>PGUpdate</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="PGUpdate|x64">
+      <Configuration>PGUpdate</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{FDB84CBB-2FB6-47C8-A2D6-091E0833239D}</ProjectGuid>
+    <RootNamespace>venvwlauncher</RootNamespace>
+    <TargetName>venvwlauncher</TargetName>
+    <SupportPGO>false</SupportPGO>
+  </PropertyGroup>
+  <Import Project="python.props" />
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <CharacterSet>MultiByte</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <PropertyGroup>
+    <MakeVersionInfoBeforeTarget>ClCompile</MakeVersionInfoBeforeTarget>
+  </PropertyGroup>
+  <ImportGroup Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="pyproject.props" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <ItemDefinitionGroup>
+    <ClCompile>
+      <PreprocessorDefinitions>_WINDOWS;VENV_REDIRECT;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+    </ClCompile>
+    <ResourceCompile>
+      <PreprocessorDefinitions>PYW_ICON;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+    </ResourceCompile>
+    <Link>
+      <AdditionalDependencies>version.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <SubSystem>Windows</SubSystem>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="..\PC\launcher.c" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="..\PC\launcher.ico" />
+  </ItemGroup>
+  <ItemGroup>
+    <ResourceCompile Include="..\PC\pylauncher.rc" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
diff --git a/Tools/msi/buildrelease.bat b/Tools/msi/buildrelease.bat
index 4178981..45e189b 100644
--- a/Tools/msi/buildrelease.bat
+++ b/Tools/msi/buildrelease.bat
@@ -37,6 +37,7 @@
 set TARGET=Rebuild
 set TESTTARGETDIR=
 set PGO=-m test -q --pgo
+set BUILDMSI=1
 set BUILDNUGET=1
 set BUILDZIP=1
 
@@ -61,6 +62,7 @@
 if "%1" EQU "--skip-pgo" (set PGO=) && shift && goto CheckOpts
 if "%1" EQU "--skip-nuget" (set BUILDNUGET=) && shift && goto CheckOpts
 if "%1" EQU "--skip-zip" (set BUILDZIP=) && shift && goto CheckOpts
+if "%1" EQU "--skip-msi" (set BUILDMSI=) && shift && goto CheckOpts
 
 if "%1" NEQ "" echo Invalid option: "%1" && exit /B 1
 
@@ -174,10 +176,12 @@
 )
 
 set BUILDOPTS=/p:Platform=%1 /p:BuildForRelease=true /p:DownloadUrl=%DOWNLOAD_URL% /p:DownloadUrlBase=%DOWNLOAD_URL_BASE% /p:ReleaseUri=%RELEASE_URI%
-%MSBUILD% "%D%bundle\releaselocal.wixproj" /t:Rebuild %BUILDOPTS% %CERTOPTS% /p:RebuildAll=true
-if errorlevel 1 exit /B
-%MSBUILD% "%D%bundle\releaseweb.wixproj" /t:Rebuild %BUILDOPTS% %CERTOPTS% /p:RebuildAll=false
-if errorlevel 1 exit /B
+if defined BUILDMSI (
+    %MSBUILD% "%D%bundle\releaselocal.wixproj" /t:Rebuild %BUILDOPTS% %CERTOPTS% /p:RebuildAll=true
+    if errorlevel 1 exit /B
+    %MSBUILD% "%D%bundle\releaseweb.wixproj" /t:Rebuild %BUILDOPTS% %CERTOPTS% /p:RebuildAll=false
+    if errorlevel 1 exit /B
+)
 
 if defined BUILDZIP (
     %MSBUILD% "%D%make_zip.proj" /t:Build %BUILDOPTS% %CERTOPTS% /p:OutputPath="%BUILD%en-us"
@@ -214,6 +218,7 @@
 echo    --skip-doc (-D)     Do not build documentation
 echo    --pgo               Specify PGO command for x64 installers
 echo    --skip-pgo          Build x64 installers without using PGO
+echo    --skip-msi          Do not build executable/MSI packages
 echo    --skip-nuget        Do not build Nuget packages
 echo    --skip-zip          Do not build embeddable package
 echo    --download          Specify the full download URL for MSIs
diff --git a/Tools/msi/make_appx.ps1 b/Tools/msi/make_appx.ps1
new file mode 100644
index 0000000..b3f190e
--- /dev/null
+++ b/Tools/msi/make_appx.ps1
@@ -0,0 +1,71 @@
+<#
+.Synopsis
+    Compiles and signs an APPX package
+.Description
+    Given the file listing, ensures all the contents are signed
+    and builds and signs the final package.
+.Parameter mapfile
+    The location on disk of the text mapping file.
+.Parameter msix
+    The path and name to store the APPX/MSIX.
+.Parameter sign
+    When set, signs the APPX/MSIX. Packages to be published to
+    the store should not be signed. 
+.Parameter description
+    Description to embed in the signature (optional).
+.Parameter certname
+    The name of the certificate to sign with (optional).
+.Parameter certsha1
+    The SHA1 hash of the certificate to sign with (optional).
+#>
+param(
+    [Parameter(Mandatory=$true)][string]$layout,
+    [Parameter(Mandatory=$true)][string]$msix,
+    [switch]$sign,
+    [string]$description,
+    [string]$certname,
+    [string]$certsha1,
+    [string]$certfile
+)
+
+$tools = $script:MyInvocation.MyCommand.Path | Split-Path -parent;
+Import-Module $tools\sdktools.psm1 -WarningAction SilentlyContinue -Force
+
+Set-Alias makeappx (Find-Tool "makeappx.exe") -Scope Script
+Set-Alias makepri (Find-Tool "makepri.exe") -Scope Script
+
+$msixdir = Split-Path $msix -Parent
+if ($msixdir) {
+    $msixdir = (mkdir -Force $msixdir).FullName
+} else {
+    $msixdir = Get-Location
+}
+$msix = Join-Path $msixdir (Split-Path $msix -Leaf)
+
+pushd $layout
+try {
+    if (Test-Path resources.pri) {
+        del resources.pri
+    }
+    $name = ([xml](gc AppxManifest.xml)).Package.Identity.Name
+    makepri new /pr . /mn AppxManifest.xml /in $name /cf _resources.xml /of _resources.pri /mf appx /o
+    if (-not $? -or -not (Test-Path _resources.map.txt)) {
+        throw "makepri step failed"
+    }
+    $lines = gc _resources.map.txt
+    $lines | ?{ -not ($_ -match '"_resources[\w\.]+?"') } | Out-File _resources.map.txt -Encoding utf8
+    makeappx pack /f _resources.map.txt /m AppxManifest.xml /o /p $msix
+    if (-not $?) {
+        throw "makeappx step failed"
+    }
+} finally {
+    popd
+}
+
+if ($sign) {
+    Sign-File -certname $certname -certsha1 $certsha1 -certfile $certfile -description $description -files $msix
+
+    if (-not $?) {
+        throw "Package signing failed"
+    }
+}
diff --git a/Tools/msi/make_cat.ps1 b/Tools/msi/make_cat.ps1
new file mode 100644
index 0000000..7074143
--- /dev/null
+++ b/Tools/msi/make_cat.ps1
@@ -0,0 +1,34 @@
+<#
+.Synopsis
+    Compiles and signs a catalog file.
+.Description
+    Given the CDF definition file, builds and signs a catalog.
+.Parameter catalog
+    The path to the catalog definition file to compile and
+    sign. It is assumed that the .cat file will be the same
+    name with a new extension.
+.Parameter description
+    The description to add to the signature (optional).
+.Parameter certname
+    The name of the certificate to sign with (optional).
+.Parameter certsha1
+    The SHA1 hash of the certificate to sign with (optional).
+#>
+param(
+    [Parameter(Mandatory=$true)][string]$catalog,
+    [string]$description,
+    [string]$certname,
+    [string]$certsha1,
+    [string]$certfile
+)
+
+$tools = $script:MyInvocation.MyCommand.Path | Split-Path -parent;
+Import-Module $tools\sdktools.psm1 -WarningAction SilentlyContinue -Force
+
+Set-Alias MakeCat (Find-Tool "makecat.exe") -Scope Script
+
+MakeCat $catalog
+if (-not $?) {
+    throw "Catalog compilation failed"
+}
+Sign-File -certname $certname -certsha1 $certsha1 -certfile $certfile -description $description -files @($catalog -replace 'cdf$', 'cat')
diff --git a/Tools/msi/make_zip.proj b/Tools/msi/make_zip.proj
index 2141117..125a434 100644
--- a/Tools/msi/make_zip.proj
+++ b/Tools/msi/make_zip.proj
@@ -15,11 +15,12 @@
         <TargetExt>.zip</TargetExt>
         <TargetPath>$(OutputPath)\$(TargetName)$(TargetExt)</TargetPath>
         <CleanCommand>rmdir /q/s "$(IntermediateOutputPath)\zip_$(ArchName)"</CleanCommand>
-        <Arguments>"$(PythonExe)" "$(MSBuildThisFileDirectory)\make_zip.py"</Arguments>
-        <Arguments>$(Arguments) -e -o "$(TargetPath)" -t "$(IntermediateOutputPath)\zip_$(ArchName)" -b "$(BuildPath.TrimEnd(`\`))"</Arguments>
-        <Environment>set DOC_FILENAME=python$(PythonVersion).chm</Environment>
+        <Arguments>"$(PythonExe)" "$(PySourcePath)PC\layout"</Arguments>
+        <Arguments>$(Arguments) -b "$(BuildPath.TrimEnd(`\`))" -s "$(PySourcePath.TrimEnd(`\`))"</Arguments>
+        <Arguments>$(Arguments) -t "$(IntermediateOutputPath)\zip_$(ArchName)"</Arguments>
+        <Arguments>$(Arguments) --zip "$(TargetPath)"</Arguments>
+        <Arguments>$(Arguments) --precompile --zip-lib --include-underpth --include-stable --flat-dlls</Arguments>
         <Environment>$(Environment)%0D%0Aset PYTHONPATH=$(PySourcePath)Lib</Environment>
-        <Environment Condition="Exists($(CRTRedist))">$(Environment)%0D%0Aset VCREDIST_PATH=$(CRTRedist)\$(Platform)</Environment>
     </PropertyGroup>
 
     <Target Name="_Build">
diff --git a/Tools/msi/make_zip.py b/Tools/msi/make_zip.py
deleted file mode 100644
index 58f3b15..0000000
--- a/Tools/msi/make_zip.py
+++ /dev/null
@@ -1,250 +0,0 @@
-import argparse
-import py_compile
-import re
-import sys
-import shutil
-import stat
-import os
-import tempfile
-
-from itertools import chain
-from pathlib import Path
-from zipfile import ZipFile, ZIP_DEFLATED
-
-
-TKTCL_RE = re.compile(r'^(_?tk|tcl).+\.(pyd|dll)', re.IGNORECASE)
-DEBUG_RE = re.compile(r'_d\.(pyd|dll|exe|pdb|lib)$', re.IGNORECASE)
-PYTHON_DLL_RE = re.compile(r'python\d\d?\.dll$', re.IGNORECASE)
-
-DEBUG_FILES = {
-    '_ctypes_test',
-    '_testbuffer',
-    '_testcapi',
-    '_testconsole',
-    '_testimportmultiple',
-    '_testmultiphase',
-    'xxlimited',
-    'python3_dstub',
-}
-
-EXCLUDE_FROM_LIBRARY = {
-    '__pycache__',
-    'idlelib',
-    'pydoc_data',
-    'site-packages',
-    'tkinter',
-    'turtledemo',
-}
-
-EXCLUDE_FROM_EMBEDDABLE_LIBRARY = {
-    'ensurepip',
-    'venv',
-}
-
-EXCLUDE_FILE_FROM_LIBRARY = {
-    'bdist_wininst.py',
-}
-
-EXCLUDE_FILE_FROM_LIBS = {
-    'liblzma',
-    'python3stub',
-}
-
-EXCLUDED_FILES = {
-    'pyshellext',
-}
-
-def is_not_debug(p):
-    if DEBUG_RE.search(p.name):
-        return False
-
-    if TKTCL_RE.search(p.name):
-        return False
-
-    return p.stem.lower() not in DEBUG_FILES and p.stem.lower() not in EXCLUDED_FILES
-
-def is_not_debug_or_python(p):
-    return is_not_debug(p) and not PYTHON_DLL_RE.search(p.name)
-
-def include_in_lib(p):
-    name = p.name.lower()
-    if p.is_dir():
-        if name in EXCLUDE_FROM_LIBRARY:
-            return False
-        if name == 'test' and p.parts[-2].lower() == 'lib':
-            return False
-        if name in {'test', 'tests'} and p.parts[-3].lower() == 'lib':
-            return False
-        return True
-
-    if name in EXCLUDE_FILE_FROM_LIBRARY:
-        return False
-
-    suffix = p.suffix.lower()
-    return suffix not in {'.pyc', '.pyo', '.exe'}
-
-def include_in_embeddable_lib(p):
-    if p.is_dir() and p.name.lower() in EXCLUDE_FROM_EMBEDDABLE_LIBRARY:
-        return False
-
-    return include_in_lib(p)
-
-def include_in_libs(p):
-    if not is_not_debug(p):
-        return False
-
-    return p.stem.lower() not in EXCLUDE_FILE_FROM_LIBS
-
-def include_in_tools(p):
-    if p.is_dir() and p.name.lower() in {'scripts', 'i18n', 'pynche', 'demo', 'parser'}:
-        return True
-
-    return p.suffix.lower() in {'.py', '.pyw', '.txt'}
-
-BASE_NAME = 'python{0.major}{0.minor}'.format(sys.version_info)
-
-FULL_LAYOUT = [
-    ('/', '$build', 'python.exe', is_not_debug),
-    ('/', '$build', 'pythonw.exe', is_not_debug),
-    ('/', '$build', 'python{}.dll'.format(sys.version_info.major), is_not_debug),
-    ('/', '$build', '{}.dll'.format(BASE_NAME), is_not_debug),
-    ('DLLs/', '$build', '*.pyd', is_not_debug),
-    ('DLLs/', '$build', '*.dll', is_not_debug_or_python),
-    ('include/', 'include', '*.h', None),
-    ('include/', 'PC', 'pyconfig.h', None),
-    ('Lib/', 'Lib', '**/*', include_in_lib),
-    ('libs/', '$build', '*.lib', include_in_libs),
-    ('Tools/', 'Tools', '**/*', include_in_tools),
-]
-
-EMBED_LAYOUT = [
-    ('/', '$build', 'python*.exe', is_not_debug),
-    ('/', '$build', '*.pyd', is_not_debug),
-    ('/', '$build', '*.dll', is_not_debug),
-    ('{}.zip'.format(BASE_NAME), 'Lib', '**/*', include_in_embeddable_lib),
-]
-
-if os.getenv('DOC_FILENAME'):
-    FULL_LAYOUT.append(('Doc/', 'Doc/build/htmlhelp', os.getenv('DOC_FILENAME'), None))
-if os.getenv('VCREDIST_PATH'):
-    FULL_LAYOUT.append(('/', os.getenv('VCREDIST_PATH'), 'vcruntime*.dll', None))
-    EMBED_LAYOUT.append(('/', os.getenv('VCREDIST_PATH'), 'vcruntime*.dll', None))
-
-def copy_to_layout(target, rel_sources):
-    count = 0
-
-    if target.suffix.lower() == '.zip':
-        if target.exists():
-            target.unlink()
-
-        with ZipFile(str(target), 'w', ZIP_DEFLATED) as f:
-            with tempfile.TemporaryDirectory() as tmpdir:
-                for s, rel in rel_sources:
-                    if rel.suffix.lower() == '.py':
-                        pyc = Path(tmpdir) / rel.with_suffix('.pyc').name
-                        try:
-                            py_compile.compile(str(s), str(pyc), str(rel), doraise=True, optimize=2)
-                        except py_compile.PyCompileError:
-                            f.write(str(s), str(rel))
-                        else:
-                            f.write(str(pyc), str(rel.with_suffix('.pyc')))
-                    else:
-                        f.write(str(s), str(rel))
-                    count += 1
-
-    else:
-        for s, rel in rel_sources:
-            dest = target / rel
-            try:
-                dest.parent.mkdir(parents=True)
-            except FileExistsError:
-                pass
-            if dest.is_file():
-                dest.chmod(stat.S_IWRITE)
-            shutil.copy(str(s), str(dest))
-            if dest.is_file():
-                dest.chmod(stat.S_IWRITE)
-            count += 1
-
-    return count
-
-def rglob(root, pattern, condition):
-    dirs = [root]
-    recurse = pattern[:3] in {'**/', '**\\'}
-    while dirs:
-        d = dirs.pop(0)
-        for f in d.glob(pattern[3:] if recurse else pattern):
-            if recurse and f.is_dir() and (not condition or condition(f)):
-                dirs.append(f)
-            elif f.is_file() and (not condition or condition(f)):
-                yield f, f.relative_to(root)
-
-def main():
-    parser = argparse.ArgumentParser()
-    parser.add_argument('-s', '--source', metavar='dir', help='The directory containing the repository root', type=Path)
-    parser.add_argument('-o', '--out', metavar='file', help='The name of the output archive', type=Path, default=None)
-    parser.add_argument('-t', '--temp', metavar='dir', help='A directory to temporarily extract files into', type=Path, default=None)
-    parser.add_argument('-e', '--embed', help='Create an embedding layout', action='store_true', default=False)
-    parser.add_argument('-b', '--build', help='Specify the build directory', type=Path, default=None)
-    ns = parser.parse_args()
-
-    source = ns.source or (Path(__file__).resolve().parent.parent.parent)
-    out = ns.out
-    build = ns.build or Path(sys.exec_prefix)
-    assert isinstance(source, Path)
-    assert not out or isinstance(out, Path)
-    assert isinstance(build, Path)
-
-    if ns.temp:
-        temp = ns.temp
-        delete_temp = False
-    else:
-        temp = Path(tempfile.mkdtemp())
-        delete_temp = True
-
-    if out:
-        try:
-            out.parent.mkdir(parents=True)
-        except FileExistsError:
-            pass
-    try:
-        temp.mkdir(parents=True)
-    except FileExistsError:
-        pass
-
-    layout = EMBED_LAYOUT if ns.embed else FULL_LAYOUT
-
-    try:
-        for t, s, p, c in layout:
-            if s == '$build':
-                fs = build
-            else:
-                fs = source / s
-            files = rglob(fs, p, c)
-            extra_files = []
-            if s == 'Lib' and p == '**/*':
-                extra_files.append((
-                    source / 'tools' / 'msi' / 'distutils.command.bdist_wininst.py',
-                    Path('distutils') / 'command' / 'bdist_wininst.py'
-                ))
-            copied = copy_to_layout(temp / t.rstrip('/'), chain(files, extra_files))
-            print('Copied {} files'.format(copied))
-
-        if ns.embed:
-            with open(str(temp / (BASE_NAME + '._pth')), 'w') as f:
-                print(BASE_NAME + '.zip', file=f)
-                print('.', file=f)
-                print('', file=f)
-                print('# Uncomment to run site.main() automatically', file=f)
-                print('#import site', file=f)
-
-        if out:
-            total = copy_to_layout(out, rglob(temp, '**/*', None))
-            print('Wrote {} files to {}'.format(total, out))
-    finally:
-        if delete_temp:
-            shutil.rmtree(temp, True)
-
-
-if __name__ == "__main__":
-    sys.exit(int(main() or 0))
diff --git a/Tools/msi/sdktools.psm1 b/Tools/msi/sdktools.psm1
new file mode 100644
index 0000000..81a74d3
--- /dev/null
+++ b/Tools/msi/sdktools.psm1
@@ -0,0 +1,43 @@
+function Find-Tool {
+    param([string]$toolname)
+
+    $kitroot = (gp 'HKLM:\SOFTWARE\Microsoft\Windows Kits\Installed Roots\').KitsRoot10
+    $tool = (gci -r "$kitroot\Bin\*\x64\$toolname" | sort FullName -Desc | select -First 1)
+    if (-not $tool) {
+        throw "$toolname is not available"
+    }
+    Write-Host "Found $toolname at $($tool.FullName)"
+    return $tool.FullName
+}
+
+Set-Alias SignTool (Find-Tool "signtool.exe") -Scope Script
+
+function Sign-File {
+    param([string]$certname, [string]$certsha1, [string]$certfile, [string]$description, [string[]]$files)
+
+    if (-not $description) {
+        $description = $env:SigningDescription;
+        if (-not $description) {
+            $description = "Python";
+        }
+    }
+    if (-not $certname) {
+        $certname = $env:SigningCertificate;
+    }
+    if (-not $certfile) {
+        $certfile = $env:SigningCertificateFile;
+    }
+
+    foreach ($a in $files) {
+        if ($certsha1) {
+            SignTool sign /sha1 $certsha1 /fd sha256 /t http://timestamp.verisign.com/scripts/timestamp.dll /d $description $a
+        } elseif ($certname) {
+            SignTool sign /n $certname /fd sha256 /t http://timestamp.verisign.com/scripts/timestamp.dll /d $description $a
+        } elseif ($certfile) {
+            SignTool sign /f $certfile /fd sha256 /t http://timestamp.verisign.com/scripts/timestamp.dll /d $description $a
+        } else {
+            SignTool sign /a /fd sha256 /t http://timestamp.verisign.com/scripts/timestamp.dll /d $description $a
+        }
+    }
+}
+
diff --git a/Tools/msi/sign_build.ps1 b/Tools/msi/sign_build.ps1
new file mode 100644
index 0000000..6668eb3
--- /dev/null
+++ b/Tools/msi/sign_build.ps1
@@ -0,0 +1,34 @@
+<#
+.Synopsis
+    Recursively signs the contents of a directory.
+.Description
+    Given the file patterns, code signs the contents.
+.Parameter root
+    The root directory to sign.
+.Parameter patterns
+    The file patterns to sign
+.Parameter description
+    The description to add to the signature (optional).
+.Parameter certname
+    The name of the certificate to sign with (optional).
+.Parameter certsha1
+    The SHA1 hash of the certificate to sign with (optional).
+#>
+param(
+    [Parameter(Mandatory=$true)][string]$root,
+    [string[]]$patterns=@("*.exe", "*.dll", "*.pyd"),
+    [string]$description,
+    [string]$certname,
+    [string]$certsha1,
+    [string]$certfile
+)
+
+$tools = $script:MyInvocation.MyCommand.Path | Split-Path -parent;
+Import-Module $tools\sdktools.psm1 -WarningAction SilentlyContinue -Force
+
+pushd $root
+try {
+    Sign-File -certname $certname -certsha1 $certsha1 -certfile $certfile -description $description -files (gci -r $patterns)
+} finally {
+    popd
+}
\ No newline at end of file
diff --git a/Tools/nuget/make_pkg.proj b/Tools/nuget/make_pkg.proj
index 9843bc9..e093a6d 100644
--- a/Tools/nuget/make_pkg.proj
+++ b/Tools/nuget/make_pkg.proj
@@ -20,25 +20,28 @@
         <SignOutput>false</SignOutput>
         <TargetName>$(OutputName).$(NuspecVersion)</TargetName>
         <TargetExt>.nupkg</TargetExt>
-        <IntermediateOutputPath>$(IntermediateOutputPath)\nuget_$(ArchName)</IntermediateOutputPath>
+        <IntermediateOutputPath>$(IntermediateOutputPath)\nuget_$(ArchName)\</IntermediateOutputPath>
         
-        <CleanCommand>rmdir /q/s "$(IntermediateOutputPath)"</CleanCommand>
+        <CleanCommand>rmdir /q/s "$(IntermediateOutputPath.TrimEnd(`\`))"</CleanCommand>
         
-        <PythonArguments>"$(PythonExe)" "$(MSBuildThisFileDirectory)\..\msi\make_zip.py"</PythonArguments>
-        <PythonArguments>$(PythonArguments) -t "$(IntermediateOutputPath)" -b "$(BuildPath.TrimEnd(`\`))"</PythonArguments>
+        <PythonArguments>"$(PythonExe)" "$(PySourcePath)PC\layout"</PythonArguments>
+        <PythonArguments>$(PythonArguments) -b "$(BuildPath.TrimEnd(`\`))" -s "$(PySourcePath.TrimEnd(`\`))"</PythonArguments>
+        <PythonArguments>$(PythonArguments) -t "$(IntermediateOutputPath)obj"</PythonArguments>
+        <PythonArguments>$(PythonArguments) --copy "$(IntermediateOutputPath)pkg"</PythonArguments>
+        <PythonArguments>$(PythonArguments) --include-dev --include-tools --include-pip --include-stable --include-launcher --include-props</PythonArguments>
         
-        <PipArguments>"$(IntermediateOutputPath)\python.exe" -B -c "import sys; sys.path.append(r'$(PySourcePath)\Lib'); import ensurepip; ensurepip._main()"</PipArguments>
-        <PackageArguments Condition="$(Packages) != ''">"$(IntermediateOutputPath)\python.exe" -B -m pip install -U $(Packages)</PackageArguments>
+        <PackageArguments Condition="$(Packages) != ''">"$(IntermediateOutputPath)pkg\pip.exe" -B -m pip install -U $(Packages)</PackageArguments>
         
-        <NugetPackCommand>"$(Nuget)" pack "$(MSBuildThisFileDirectory)\$(OutputName).nuspec" -BasePath "$(IntermediateOutputPath)"</NugetPackCommand>
+        <NugetPackCommand>"$(Nuget)" pack "$(MSBuildThisFileDirectory)\$(OutputName).nuspec" -BasePath "$(IntermediateOutputPath)pkg"</NugetPackCommand>
         <NugetPackSymbolsCommand Condition="Exists('$(MSBuildThisFileDirectory)\$(OutputName).symbols.nuspec')">"$(Nuget)" pack "$(MSBuildThisFileDirectory)\$(OutputName).symbols.nuspec" -BasePath "$(BuildPath.TrimEnd(`\`))"</NugetPackSymbolsCommand>
         <NugetArguments>$(NugetArguments) -OutputDirectory "$(OutputPath.Trim(`\`))"</NugetArguments>
         <NugetArguments>$(NugetArguments) -Version "$(NuspecVersion)"</NugetArguments>
         <NugetArguments>$(NugetArguments) -NoPackageAnalysis -NonInteractive</NugetArguments>
         
-        <Environment>set DOC_FILENAME=python$(PythonVersion).chm</Environment>
         <Environment>$(Environment)%0D%0Aset PYTHONPATH=$(PySourcePath)Lib</Environment>
-        <Environment Condition="Exists($(CRTRedist))">$(Environment)%0D%0Aset VCREDIST_PATH=$(CRTRedist)\$(Platform)</Environment>
+        <Environment>$(Environment)%0D%0Aset PYTHON_NUSPEC_VERSION=$(NuspecVersion)</Environment>
+        <Environment Condition="$(Platform) != 'x86'">$(Environment)%0D%0Aset PYTHON_PROPS_PLATFORM=$(Platform)</Environment>
+        <Environment Condition="$(Platform) == 'x86'">$(Environment)%0D%0Aset PYTHON_PROPS_PLATFORM=Win32</Environment>
         <Environment>$(Environment)%0D%0Amkdir "$(OutputPath.Trim(`\`))" &gt;nul 2&gt;nul</Environment>
     </PropertyGroup>
 
@@ -48,22 +51,7 @@
 
     <Target Name="_Build">
         <Exec Command="$(CleanCommand)" />
-        <Exec Command="setlocal%0D%0A$(Environment)%0D%0A$(PythonArguments)" />
-        <Exec Command="$(PipArguments)" />
-        <Exec Command="$(PackageArguments)" Condition="$(PackageArguments) != ''" />
-
-        <PropertyGroup>
-            <_PropsContents>$([System.IO.File]::ReadAllText('python.props'))</_PropsContents>
-            <_PropsContents>$(_PropsContents.Replace('$$PYTHON_TAG$$', '$(MajorVersionNumber).$(MinorVersionNumber)'))</_PropsContents>
-            <_PropsContents>$(_PropsContents.Replace('$$PYTHON_VERSION$$', '$(NuspecVersion)'))</_PropsContents>
-            <_PropsContents Condition="$(Platform) == 'x86'">$(_PropsContents.Replace('$$PYTHON_PLATFORM$$', 'Win32'))</_PropsContents>
-            <_PropsContents Condition="$(Platform) != 'x86'">$(_PropsContents.Replace('$$PYTHON_PLATFORM$$', '$(Platform)'))</_PropsContents>
-            <_PropsContents>$(_PropsContents.Replace('$$PYTHON_TARGET$$', '_GetPythonRuntimeFilesDependsOn$(MajorVersionNumber)$(MinorVersionNumber)_$(Platform)'))</_PropsContents>
-            <_ExistingContents Condition="Exists('$(IntermediateOutputPath)\python.props')">$([System.IO.File]::ReadAllText('$(IntermediateOutputPath)\python.props'))</_ExistingContents>
-        </PropertyGroup>
-        <WriteLinesToFile File="$(IntermediateOutputPath)\python.props"
-                          Lines="$(_PropsContents)"
-                          Condition="$(_PropsContents) != $(_ExistingContents)" />
+        <Exec Command="setlocal%0D%0A$(Environment)%0D%0A$(PythonArguments)%0D%0A$(PackageArguments)" />
 
         <Exec Command="$(NugetPackCommand) $(NugetArguments)" />
         <Exec Command="$(NugetPackSymbolsCommand) $(NugetArguments)" Condition="$(NugetPackSymbolsCommand) != ''" />