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Windows 10 21H2 and Windows 11 21H2 both show up as "2009" release
I'm not real sure where to post this, so will try here. I have noticed that for both Windows 10 - 21H2 and Windows 11 - 21H2, the "ReleaseID" value in the Registry is incorrectly shown as "2009"....
Keith_Hemmelman we had the same question a while ago.
The ReleaseID regkey is deprecated.
https://borncity.com/win/2021/05/26/windows-10-21h1-reports-releaseid-2009/
Instead you can use the DisplayVersion regkey from HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion
Otherwise in Windows 11 this key is showing 21H2. I did not find an exact reason for this.
If anyone has a clue, please share, that would be great.
About the buildnumbers for Windows 11 this link can clear this out.
https://docs.microsoft.com/en-us/answers/questions/586619/windows-11-build-ver-is-still-10022000194.html