after installing AMD Catalyst Radeon 5.5 (Windows XP/2000/Media Center) Ive had the screen resolution reset on my laptop. fine, Ill 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 ppl say its dangerous and other people say its teh only correct way :) i just want to go back to teh driver that worked yetserday. Whats the right sequence?