diff --git a/Lib/platform.py b/Lib/platform.py
index 288bc95..2dcf5e1 100755
--- a/Lib/platform.py
+++ b/Lib/platform.py
@@ -1027,6 +1027,12 @@
         machine = ''
     if processor == 'unknown':
         processor = ''
+
+    #  normalize name
+    if system == 'Microsoft' and release == 'Windows':
+        system = 'Windows'
+        release = 'Vista'
+
     _uname_cache = system,node,release,version,machine,processor
     return _uname_cache