How to remove Media Center from Windows 8
Microsoft were recently giving away FREE serial keys to add Media Center to Windows 8 Pro, but I missed the boat. A friend offered to give me one of the spare keys they'd gotten for free from MS, and so I decided to give it a shot. The "Upgrade Windows" screen said the key was valid, so I proceeded and Windows quickly installed Media Center to my copy of Windows 8 Pro.
Unfortunately, on reboot, it then decided that the key had been activated too many times (arg! so much for a "spare" key!), and now my copy of Windows 8 Pro is no longer activated... at all!
I've tried re-entering my valid serial for Windows 8 Pro, but Windows had apparently decided I have a copy of Windows 8 Pro with Media Center, which is different than plain old Windows 8 Pro -- and so my old key wasn't valid.
I've gone into Add/Remove Features of Windows 8 and uninstalled Media Center, but Windows still considers itself to be this new version of Windows 8, no longer covered by my valid Windows 8 Pro key. (Why can't I "downgrade" back to Windows 8 Pro, seeing how I never actually upgraded to Windows 8 Pro with Media Center...?)
I wouldn't mind buying an upgrade key from Windows 8 Pro to Windows 8 Pro with Media Center, but even that is proving difficult:
What can I do to remedy this situation?