After installing NVIDIA GeForce Notebook Graphics Driver 337.88 i've had stuttering in every game on my gaming desktop. Fine, i'll just roll it back. Except teh 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 people say its the only correct way. I just wanna go back to the driver that worked yesterday. Whats the right sequence?? thx in advance!!
rgb adds +10 fps everyone knows that
