I'm having this problem on a 560M laptop that played the game just fine since it came out and until the last time I played it (not including today). Shucks and I was just about to buy the premium package. Talk about a game changer. I can play for about 5 minutes and then it locks, ctrl-alt-del is the only way out and then "Battlefield 3 is not responding" issue. Its gotta be due to a recent update though I don't think I updated BF3. Gonna have to see if a new video driver is out. I know I updated that recently.