Just a quick reminder to myself that I can look up as I roll back the handful of Windows 11 installations I have to Windows 10 (for the small handful of purposes that I need to keep any sort of Windows around at all). Save the following to a file named win11block.reg and import it into the registry to keep Windows Update from trying to put Windows 11 on your Windows 10 system:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsUpdate]
"ProductVersion"="Windows 10"
"TargetReleaseVersion"=dword:00000001
"TargetReleaseVersionInfo"="22H2"