The patch in question is KB3081424 (ironically enough a roll-up of bug fixes) and during its update process affected users find it fails and triggers the message: “We couldn’t complete the updates, undoing the changes.” Undoing them results in a mandatory system reboot, but as soon as the user logs back on Windows 10’s update process kicks in and tries to install KB3081424 again.
I’m sure you’re way ahead of me here, but since Windows 10 updates cannot be stopped KB3081424 tries to install over and over again which leaves systems caught in endless reboot loops.
Why wouldn’t KB3081424 eventually install correctly? Because the initial failed install has been found to create a bad entry in the Windows 10 registry which stops its subsequent attempts to reinstall from working correctly.
