All OS hells are hairy to spend time in (corrupted system files, kernel panic etc.), but Windows ones are particularly depressing, b/c I never really feel in control of the restore/rescue process. It's usually a pray & wait thing. https://support.microsoft.com/en-us/help/947821/fix-windows-update-errors-by-using-the-dism-or-system-update-readiness …
On a sidenote, Windows is really shit at helping users wean themselves off SMB1, but there's no way in hell I'm reenabling that poisonous dinosaur. SMB2/3 or bust. https://support.microsoft.com/en-us/help/2696547/how-to-detect-enable-and-disable-smbv1-smbv2-and-smbv3-in-windows-and …