While playing I will get a system crash that goes to the blue screen saying the system has encountered a fatal error, windows has shutdown to stop damage to your machine, and it starts a memory dump and restarts my computer. Im running on vista and havent seen a blue screen system crash since the old 98-2000 os's. While I havent checked the system requirements for the game I really doubt its that. I have 8gigs of ram and a 9800gtx+ grapics card (Nivida 1gig+) with over 500gigs of free space. My computer is checked daily for viruses with the most up-to-date subscription of norton anti virus and I havent gotten this error anywhere else but playing this game.