Windows Upgrade Help and more

Yeah, that's the way to go. Also, sometimes just restarting Explorer through Task Manager can snap it back to normal.

Yeah, Did you get an error code when the upgrade failed, or did it just roll back?

Did you also make sure Secure Boot is enabled in the BIOS?

You could also try a clean install from a USB drive instead of the in-place upgrade, as that sometimes bypasses weird upgrade blockers. Good luck!