Step one, for me, would be to back up all your data files to an external drive, either a Flash Drive or External HD.
Step two, also for me, would be to permanently disable MS Updates.
As a working PC tech, I found MS Updates to be extremely troublesome, sometimes Disastrous!
Personally, as soon as I install either Windows 10 or Windows 11, I install a program called, "StopUpdates10.exe".
It allows me to STOP all updates, and then if I ever want to, Turn them back ON again.
Nice little program, and it's FREE.
Good Luck
Shadow
PS: If you've not turned System Restore OFF, then run it to go back to a time before you got the bad update.