I installed Windows 7 professional last week. After installing my games ect, i was playing a youtube video and i got the blue screen saying my pc had been shut down to prevent damage. then all the dump memory stuff at the bottom. I turned off and turned back on. I uninstalled all recent programmes and for a few days it was fine, running perfectly well and fast. Just a few hours ago it happened again whilst starting a game up. Will i have to reinstall windows or is there some hardware issue? Only happened twice over a week but its still obv a problem. Thanks!