I am having the same problem. It generally occours when changing resolutions (alt-tab, entering-exiting games) . We all have the same similar hardware too. So there is something peculiar here.
It didnt' do this when I had the windows x64 evaluation version installed. Nor did it do this before I had SP2. I'm leaning towards software,-- windows software. I have all the latest updates, and all the latest drivers. If I had to take a shot in the dark I bet it is one of those many windows "updates" I have installed. I'm currently doing trial and error i'll keep everyone posted.
It didnt' do this when I had the windows x64 evaluation version installed. Nor did it do this before I had SP2. I'm leaning towards software,-- windows software. I have all the latest updates, and all the latest drivers. If I had to take a shot in the dark I bet it is one of those many windows "updates" I have installed. I'm currently doing trial and error i'll keep everyone posted.