So I've run into an issue with a perticular customer and their Windows Update. He rolled back from Windows 10 to Windows 7 and now Windows Update constantly shows a "Windows 10 upgrade failed" error. The error goes away if you open the update screen and then close and reopen it. However, that error returns on reboot. I've run update reset tools, CCleaner for the registry just in case, ATF cleaner and even the Windows Disk Cleanup. Any ideas on how to remove this error?