Lately I have been having issues with my computer freezing up at random intervals. Recently I have figured out that this only happens when my graphics card tries to build some 3/d image (like a video game, Google earth, solid works renderings, etc). These problems have started just after my Norton anti virus expired. It was expired for about a month before I found AVAST and I downloaded it. It fixed a few issues but It still freezes up whenever I try to load up anything 3D. I think It is a virus, but I really have no idea why it is shutting off/freezing. I have a ATI all in wonder 9600xt graphics card and I have a Microsoft Windows xp Professional. I have NEVER had this problem before and It used to run perfectly.