My boyfriends computer has been having some wierd error the last few days. The computer just freezes up with a wierd screen, usually green or red with some pattern all over it. He has to shut it off and if he waits long enough, it will restart. If he restarts right away, it won't load Windows. Sometimes the red light that says the computer is thinking won't even come on and nothing is displayed on the screen. He has XP Media Center Home, SP3, and a 7800GTX video card. Could it be a hard drive issue or is it the video card? A few months back we took it to Geek Squad and they said the HD was bad, so we bought a new one and brought it home to replace it ourselves. After several failed attempts, he took it to a computer guy who said the HD was fine and got it up and running again. Any help here would be GREATLY appreciated. Thanks!!