I have just moved house and managed to knock over my computer unit, it wasn't a massive bang but seems to have been enough to screw up something. Now when I start up after bios I get a plane blue screen. So I removed then reinstalled the graphics card which I now think feels a bit loose and restarted while hold the weight of the card slightly and now I get windows desktop screen but with artifacts. If I open a web page for example, the screen instantly goes back to the blank blue screen. Anyone got any suggestions? Could it be the motherboard? Or most likely GPU card?