for me it was one of two things. i changed both, because i was so frustrated, so i'm not sure which one it was.
it was either
realtek onboard audio conflicts. not sure about this one, but i never had the bsod until after i installed an ht claro plus soundcard.
a gigabyte utility called 'easy tune'. it's to modify bios settings for my gigabyte motherboard from within w7. i had replaced the motherboard at the same
time i installed a sound card (long story short, i screwed up my first motherboard by trying to install components while delirious and bent some pins and mashed some things, lol.)
anyway, after removing realtek audio drivers, and removing easy tune, i just finished playing for a few hours with no bsod.