Not the OP, but one thing I've run into is that I've had three or four Windows installs (both Windows 11 and Windows 10) just fail to upgrade - one of them new upgrades just stopped showing up, I had to install an 'enablement package' and that fixed it but there was literally no warning or instructions of what to do, I just had to Google it when I noticed I wasn't getting updates.

The others just failed with random hexadecimal error codes, again I had to Google to try and work out what was going on.

With one of them I had to use the command line and diskpart etc. to expand the recovery partition because apparently the default size when I'd made that Windows 10 install was no longer big enough, and Windows Update couldn't work this out (the error code from the failure was nondescript, took ages to find out what was actually wrong) and couldn't fix it. Had to do it manually in Powershell.

Another one I think might have fixed by running sfc and dism recovery commands in the command line, again it would be nice if Windows could work this out itself!