i've tried running only on my primary display, no effect. and yess i've looked up the IRQL statement, but it hardly does me any good. Besides, GC2 is the only software that causes the problem, and i run tons of software, games included, some just as new and newer than GC2, and certainly more resource intensive, and they all run without problems. Nothing has ever given me Crashes (BSoD) like GC2 has. (not a complaint, keep in mind i love the game).