Hey, I'm having these random blue screens and I can't find the cause. They seem to happen when I'm gaming. I've had 4 so far in a time span of a week and a half, most of them during a game, but the others occur after the first BSOD directly after logging onto windows. Directly after the BSOD I struggle to log on again as I barely get past the BIOS screen then I get a message telling me that the Bootmgr is corrupt and that it can't start the system. After a couple restarts and loading the optimized defaults in the BIOS I can finally log on. I didn't have this problem when I was using windows 7 professional 64-bit, only after a clean install of ultimate. The games it gives me trouble in are GTA4:Episodes of liberty City and Lord of the rings online, other games seem fine. Another thing to add is that i use the MSI graphics card utility "Afterburner" on system startup, but I don't apply any overclocking to my system, not the utility nor the onboard overclocking switch. Attached are the dump files. Please help.