I just built a gaming PC myself and it has been restarting by iyself lately firstly I put Window 8.1 Enterprise x64 and it comes up with a sad face and says windows will restart your PC for you now I put Windows 7 Ultimate on it it comes up with some blue screen that looks like command prompt exept it's blue with yellow writing it then restarts and you cannot even read what it says it goes that fast then it restarts without my permission what can I do to stop this all togever?