I just had a strange, to me, change in my Win Xp. When I ended my turn in Doms3, and went back to desktop, a grey rectangular box, appeared, with the words, 'input not supported' inscribed inside box. the box slowly moves around the screen, blocking everything under it, and bounces off the sides. is this another bug/ virus? I was on line at the time, to email sights and SD. What do I do? IS it dangerous? Apprentice help for your all in the know. Thanks