That makes sense. One of the updates it did last night was an Nvidia driver update. Unfortunately, I don't think I can get it started now to roll back the driver.

Once again, an update to Win 10 on my Mac Pro has completly crashed. I'm running 4 x 1t drives. Yosemite, Time Machine, Win 7 and Win 10. For the third time now, Win 10 has done an update and...