Microsoft updated on my pc as I was shutting down then my monitor didn't come back up I connected it to another pc an it worked fine so I cleaned the pc an unplugged the video card an the monitor worked without the video card so I plugged the card back in to my pc but monitor wouldn't come up again but the fan on the card was on,then I restored my pc to before the update an hooked it all back up an no monitor again. I unplugged the card an it works fine but not on some games an some office stuff is real slow or not working at all.it seems I may need a new video card, but that one is only a year or so old.also my performance rating went from a 5.3 to a 3.3