Office Updated?
Caused Shit?
- Close it all down.
- Go here and pick and old update.
- Write down this number

- Open CMD as admin and do these commands
cd %ProgramFiles%\Common Files\Microsoft Shared\ClickToRun\
OfficeC2RClient.exe /update user updatetoversion=16.0.NUMBERFROMABOVEOffice will update.
Yay
To stop updates landing this often in the first place, see Change M365 Update Channel.