gh-152433: Windows: change winreg to conditional import for UWP compatibility (#154918)

Author: thexai

Lib/importlib/_bootstrap_external.py

@@ -33,7 +33,10 @@
 _MS_WINDOWS = (sys.platform == 'win32')
 if _MS_WINDOWS:
     import nt as _os
-    import winreg
+    try:
+        import winreg
+    except ImportError:
+        winreg = None
 else:
     import posix as _os
 

Misc/NEWS.d/next/Windows/2026-07-31-18-40-43.gh-issue-152433.Pq3-U-.rst

@@ -0,0 +1,2 @@
+Changed :mod:`!winreg` to conditional import for Universal Windows Platform
+compatibility.