Recently, i've been having this blue screen that occurs just when i'm about to exit my game, Call of Duty 4. I wasn't able to note down much but i managed to get this file from the BSOD - PnkBstrk.sys . Now i'm guessing this file is from the program Punkbuster which runs when i game online in Call of Duty 4. My hard drive has been formatted just last week and the Windows XP is a fresh install. Attached are the minidumps - I would be very grateful if anyone could advise. Thanks in advance.