after installing NVIDIA GeForce Ion Graphics Beta Drivers 267.24 Windows XP 32-bit i've had a black screen after login on my prebuilt tower, fine, i'll 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 pepole say its dangerous and other ppl say its teh only correct way. i just want to go back to the driver that worked yesterday. Whats teh right sequence? seriously need help here 😭
