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Appears that you are having a problem with the August 12 Microsoft Patch Tuesday updates. I experienced the identical BSOD problem as you described with my system also. Had to do an image restore to get things back to normal. Did another windows update the next day and died again with same BSOD shortly thereafter. Could not reboot. Image restore time again. Microsoft made corrections to the patches sometime around the 15th or 16th. Updated system on 16th and have had no problems since.

I had an identical situation with my system. New drivers, etc. had no effect.
Try shutting down your system and then completely remove AC power by shutting off the power supply switch or disconnecting the AC from the wall plug for 15-20 seconds.
This worked believe it or not.
Apparently the USB port was in a state of electronic limbo after I unplugged a flash drive sometime earlier without going thru the proper software disconnect procedure.
Problem totally disappeared and has not returned after 4-5 weeks.
Good Luck!