So here's my problem. I upgraded to Windows 8.1 Pro from Windows 8.1 Pro Preview. I was activated on that. After the upgrade, I was no longer activated. I used one activation method that involved me renaming "tokens" files and deleting my "cache.dat" and that activation worked. I then installed Windows Media Center using a key from the WIndows Ultimate Key Finder Premium (or whatever it may be called). After I installed Windows Media Center, I was no longer activated. I have tried using the latest KMSpico beta to activate, but to no avail. It only activated my Office 2013. What should I do to activate my 8.1 Pro? Do I have to get rid of my WMC? I really am at a loss for what to do it seems I've tried every activation method to no avail. Thank you to all who try and help.