While surfing the web, my computer hangs and the screen keeps blinking. So i manually restart the computer, but the screen when you just start up the computer, the one where its all black and you see the manufacturer or something. The thing is that everything is messed up. Theres a whole lot of "!" on it and the spelling is messed up too. (nvdia becomes ovdia etc). I tried running in normal mode and after the loading screen, it just go to a black screen and windows wont load. I tried several things such as reverting to last good configuration but no luck. However, after much restarts i finally am able to start my computer again. But after few hours of usage, while playing a video game, my computer hangs and the screen keeps blinking. And now no matter how much i restart it wont work. I have no idea what to do so ANY help would be appreciated EDIT : i can run in VGA mode but i just cant run in normal mode. Also, after waiting for sometime after the black screen, a somewhat distorted image of the welcome screen(?) appeared.