Just wanted to publicly say that avast! 5 is NOT the cause of my slow game play and now all my shields are up and running. I made the mistake of doing MS updates just prior to running the 5 install. I've had to revert back to a 10 Mar restore, then reinstalled 5 and no problems. But I still have to shake out the MS problem. )) So there, my conscience is clear and I hope I have cleared avast! 5's rep. )))