Check in the events log in Admin tools in the control panel.
I had kind of the same problem not that long ago when windows file protection was restoring old files over the top of new drivers i was installing. Eventually the installer would crash and id end up with no drivers installed at all..
It will come up in the log as restoring some changed file ati????.something.
The only way i could fix it was to fresh install from a proper copy of windows and not use the recovery disk that came with the pc..
Im using a 256 mb 9550 Radeon and i get 45-60 FPS with 4xAA and 4xAF.. Its overclocked to 350 mhz up from 200mhz tho...
You could probably pick up a 9550 for about £7.50 on ebay, and if you overclock it the burning smell stops after the first few hours.... Been using it OC'd for 6 months now and never had a problem...
Ive got a S2 licence and everything else works but i cant get the editor to work properly..
I press shift-u and it goes to the editor but there is no "load Layout" button in the bottom right corner or the object window doesnt open when o is pressed.
I need help with this as i need to get some stunt driving on the go....