Had a sever case of the lockups when i 
first started AH.  It happened when i moved 
from Voodoo 3 to geForce 2 MX.  My card performed well in all my other games. 
  (CFS, CFS2, Janes WW2 fitrs, EAW) however 
it wouldnt make it 5 minutes in AH.   I 
did the whole 'current driver' thing but i 
suspect my power supply was the culprit.
  Had a 250watt, installed a 300 watt.  
Havnt had a single problem since.  May 
be worth the 45 bucks to update to a 300watt
 if you havnt got 1.