So I've had this computer since September and have not been having any issues until I updated to Windows 7 from Vista. Everything works fine and dandy until I decide to watch a video in full screen mode. It is the worst when watching online videos. Once the computer crashes the screen goes blank and all sound cuts out. The only way to restore the computer is to force it off. For online videos this happens in a few minutes or sometimes a few seconds and for downloaded videos this happens after a little longer, usually around thirty minutes. I have uninstalled and reinstalled all of the graphics and sound drivers
and have run hard ware diagnostics on everything repeatedly. Any ideas? Also I do play very taxing games on this computer but I have never had any such issue.