BSOD after black screen right before shutdown

When I shutdown, right near the end the screen goes black as one would expect and then for a fraction of a second I get BSOD and it will restart and let me know that it BSOD'ed. It's a new install of windows 7 on a new PC that is working well under stress testing. And i haven't messed with much but xbmc and some light overclocking without voltage changes. I've uninstalled anything recent and...