Crashes to Desktop or Restarts

[Unregistered]

My BF1942 crashes to desktop or restarts mostly when im flying around, but also on ground doing whatever. It use to Crash always at the end of the round but that was fixed with renderer.allowAllRefreshRates 1. But the way it is still annoys me alot especially in practices or matches please help someone.

Spec - Athlon 1.6, 523 DDR Ram, GeForce 2 GTS

HELP!