I leave my computer idle for sometime, and it seems to mess up after a certain amount of time. if i turn off the screen, or if i dont turn off the screen it still seems to mess up. like ill fall asleep then awake to a screen with nothing on it. you can't see any icons at all, but i can still move the mouse. no task bar, no icons, no nothing. what could be the problem? i am hoping to reolve this because of the fact that i do download things over night. any help is appreciated.