I need help. I have an uncle who lets me use his comp. for almost a year now. We tackled all sorts of problems before but recently thing are very...odd. I play Age of Empires II,III,Axis & Allies,and a Company of Heroes demo. I could play them for hours with the graphics on low. Anyway...About a month or two ago we got a new video card. After installation I played Age II-good. Then Age III on high settings-great! But when i tried Company of Heroes and Axis & Allies they both played well without lag,etc. But after 10 min my Gateway monitor goes blank screen but I can still hear the sound from the fighting or music.So I go back and play Age III and after 2 hours it does it too!! I know the computer has surpassed the requirements for all the games. I don't think it's any programs or virus's because we wiped the comp clean before installation and one time before all this I played Age III with 30 programs on and it never restarted. I don't know what could be causing this. I'll post the specs later for better analysis. This is really bothering me ... I haven't played any games because of it .