Can load Single player fine, crashes on multiplayer?
 

Hello, my friend can load and play single player just fine but when he gets to the map screen in multiplayer after joining the server and gets a run time error, crashing his game.
His specs are:

AMD Athlon 7750 dual core 2.7 Ghz
3 Gb ddrm ram
Win XP Pro
ATI Radeon 3850 X2 (Crossfire)

He's tried deleting his shaders in his cache, doesn't use AVG. Any help would be great. Thank you.