My advice would be to switch out your video card or RAM. In doing research on this issue, I found that it is in most cases, one's video or RAM. It worked for us and I have no clue why our video started causing that. RAM doing the same thing in a really nice laptop belonging to a friend. She paid $150 to someone for telling her it was a "harware issue" and that she should pay tons to send it back to the manufacturer. I removed a RAM stick and it never looped again. One of them was bad.

I'm sure the more seasoned vets here can tell you a bit more, however, in my experience with several machines doing it, I would swap out the video for another, or the RAM.

Try RAM first, easier!

Sharon