after installing NVIDIA GeForce iCafe Graphics Driver 376.11 Ive had stuttering in every game on my prebuilt tower. fine, Ill just roll it back... except the Roll Back Driver button is greyed out, and when i uninstalled it Windows put a driver back on its own... i keep getting this:

USB Audio Device Properties
Device status:
This device cannot start. (Code 10)
{Operation Failed}
The requested operation was unsuccessful.
ive heard of DDU, but people say its dangerous and other peolpe say its teh only correct way. i just want to go back to teh drvier that worked yesterday... whats the right sequence? any ideas??

