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Title: Windows version from `sys.getwindowsversion()` is wrong in binaries that do not declare Windows 10 support · Issue #146299 · python/cpython · GitHub

Open Graph Title: Windows version from `sys.getwindowsversion()` is wrong in binaries that do not declare Windows 10 support · Issue #146299 · python/cpython

X Title: Windows version from `sys.getwindowsversion()` is wrong in binaries that do not declare Windows 10 support · Issue #146299 · python/cpython

Description: Bug report Bug description: Repro: Install Python for Windows (ideally create a new installation, since you'll need to patch it). Using Resource Hacker, or any other PE resource editing tool, remove the

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og:image:altBug report Bug description: Repro: Install Python for Windows (ideally create a new installation, since you'll need to patch it). Using Resource Hacker, or any other PE resource editing tool, remov...
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#152604https://github.com/python/cpython/pull/152604
Windows version from sys.getwindowsversion() is wrong in binaries that do not declare Windows 10 supporthttps://github.com/python/cpython/issues/146299#top
#152604https://github.com/python/cpython/pull/152604
OS-windowshttps://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%22OS-windows%22
interpreter-core(Objects, Python, Grammar, and Parser dirs)https://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%22interpreter-core%22
type-bugAn unexpected behavior, bug, or errorhttps://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%22type-bug%22
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on Mar 22, 2026https://github.com/python/cpython/issues/146299#issue-4116511999
https://issues.chromium.org/issues/494938698https://issues.chromium.org/issues/494938698
sysmodule.c implementation of sys.getwindowsversion()https://github.com/python/cpython/blob/161329cde2b1ce4e6a6fdd85c0da1d857aebfd2d/Python/sysmodule.c#L1648
officially documentedhttps://learn.microsoft.com/en-us/windows/win32/devnotes/rtlgetversion
substantialhttps://github.com/golang/go/blob/c60392da8b6f18b2aa92db5d22c4963ec25ae0ad/src/internal/syscall/windows/version_windows.go#L37
listhttps://github.com/libuv/libuv/blob/9f0101dcb81b9155e24c18c9dc91a47b3f11c62f/src/win/util.c#L1583
ofhttps://github.com/dotnet/runtime/blob/f6d4ffd1dba9478b91d79371e77270d05e2d8a1d/src/libraries/System.Private.CoreLib/src/System/Environment.Windows.cs#L146
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