Hello there, I recently bought a new pc with windows 7 Ultimate. It closes and start itself while I am playing a game. Or it will freeze while installing a game or just no doing anything! please help me. contact with me at [email address deleted for safety] System information: amd phenom(tm)II X4 965 3.40GHz amd sapphire 7770 oc edition power 650W ram 2GB MSI 760M-P23 Windows 7 Ultimate Not Overclocked.