I'm using an NVidia 8500 GT video card.. or I was. Over the last few weeks, every once in a while my monitor would get no signal. Once I restarted the computer, the signal was restored and everything was fine. I got a pretty bad virus this weekend, and shortly after I managed to finally fix my system, my video card no longer sends any signal at all. It doesn't matter which port on the card I plug my monitor into, I get no signal. Restarting no longer solves the issue. The monitor works fine if I plug it into the VGA port on the back of my computer, so I know its not that. When I opened the tower up, I noticed it was pretty dusty inside. My question is this: Was the timing just a coincidence? Is my card fried to to dust buildup/overheating, or did the removal of the infected files somehow remove something that allowed my card to be detected and run?