- last post: 01.01.0001 12:00 AM PDT
Get the patch here. Chances are it's an incompatibility problem between high-end video cards, Service Pack 2, and Halo PC. I had this problem myself, so I remembered the URL for it.
Go, now frag some Covenant with the mouse and keyboard. Just post if you have any problems.
[Edited on 4/21/2006]