Hi all. I have had the same problem for a couple of weeks - hell maybe a month or so, who knows. I was very confused, I could not figure this out. I have an average system xp pro sp2 yada,yada.yada. Norton AV and so on. After finding this post, I decided to try a different antivirus solution. Panda Anti virus to be exact. PROBLEM SOLVED . My system is now stabe. I can play my game or burn a DVD without the frustration of my system shutting down. Hope this helps......