The only time I've crashed W7 was with a USB stick. Was in the middle of a Skype conversation with three docs open; shoved the stick into the slot to refer to a fourth, and lo, the blue screen of death.
Worse still, I seem to remember I had to do a Windoze repair (or was that Mrs Jim's XP... it's all a blur)
But it was
annoying at the time, I certainly corrupted a couple of the open documents.