diff --git a/Lib/pathlib.py b/Lib/pathlib.py
index 1518d49..ebc2c02 100644
--- a/Lib/pathlib.py
+++ b/Lib/pathlib.py
@@ -33,6 +33,7 @@
 
 _IGNORED_WINERRORS = (
     21,  # ERROR_NOT_READY - drive exists but is not accessible
+    123, # ERROR_INVALID_NAME - fix for bpo-35306
     1921,  # ERROR_CANT_RESOLVE_FILENAME - fix for broken symlink pointing to itself
 )
 
diff --git a/Misc/NEWS.d/next/Windows/2021-04-22-20-39-49.bpo-35306.F0Cg6X.rst b/Misc/NEWS.d/next/Windows/2021-04-22-20-39-49.bpo-35306.F0Cg6X.rst
new file mode 100644
index 0000000..af41b3c
--- /dev/null
+++ b/Misc/NEWS.d/next/Windows/2021-04-22-20-39-49.bpo-35306.F0Cg6X.rst
@@ -0,0 +1,2 @@
+Avoid raising errors from :meth:`pathlib.Path.exists()` when passed an
+invalid filename.