Hi HellOfMice,
I found this on the web if you want to try:
To prevent the Windows 11 24H2 update using the registry, navigate to "HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate" and create a new DWORD value called "TargetReleaseVersion" with a value of "1"; then, create a new string value called "TargetReleaseVersionInfo" and set its value to the specific Windows 11 version you want to stay on (e.g., "22H2") to effectively block the update to 24H2
Have not tried it myself yet - you'd want "23H2" I think ...
John Z