I upgraded from Windows 7 to 10 but didn't like it, so I rolled back to Windows 7 sp1 pro, but not without problems!
When I'm trying to use Windows upgrade I get the message "Windows 10 couldn't be installed" Error code 1900101-30018.
It's very annoying since the update doesn't seem to work anymore.
Do you have any clues? Any help is appreciated, I've tried everything (obviously not), and spend a lot of time on nothing!
