The qualifying license is deactivated when Win 8 is installed over it. What I did was to create an Image of Win 7 just before I installed Win 8 Pro....
If that's the case then your easiest avenue is either a refresh or a custom install. Personally I'd back up what you can and go for a custom or clean...
Try to Custom Install rather than Upgrade Install. You will be surprised . Many strange problems have been successfully fixed with a Custom Install....