This may or may not be related to your problem.
https://forums.geforce.com/default/topic/550032/geforce-500-400-series/nvidia-driver-320-49-whql-freezing-my-pc/
http://www.dedoimedo.com/computers/nvidia-freezes.html
Basicly, try using 314.22 drivers. Lastest good drive before crashing and freezing in windows 7.
https://forums.geforce.com/default/topic/550032/geforce-500-400-series/nvidia-driver-320-49-whql-freezing-my-pc/
http://www.dedoimedo.com/computers/nvidia-freezes.html
Basicly, try using 314.22 drivers. Lastest good drive before crashing and freezing in windows 7.