Originally Posted By: John Payne
...... update ended with a "could not install update" message ......... So what the heck could have caused that?

Permissions or Group Policy issue probably; i frequently have to use "Takeownership" (seek for a download called Takeownership.zip) again when Microsuck's updates screw-up my W10. Tweaking.com's Windows Repair too is of great help, repairing permissions, installers and tons more. Filehippo or MajorGeeks are recommended places where you can find these IMO necessary tools. PS only this month i had to reinstall an older Win10 boot partition True Image backup nevertheless after Windows had updated itself without my "permissions". F