help!! after installing NVIDIA GeForce Quadro NVS Graphics Driver 337.19 Beta for FreeBSD 32-bit Ive had a black screen after login on my laptop. 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 people say its the only crorect way. i just wanna go back to the driver that worked yesterday. Whats the right sequence? any ideas??