install the latest possible drivers for your video card (i'm using nvidia so can't speak to specifics in your case). You may have to download beta drivers that apply to crisis. research to find out.
Next, install the latest dx updates from microsoft. Google direct x updates and install. This sometimes fixes problems (notoriously with BioShock at one point).
Finally, reinstall the game and make sure there is not much running in the background (ie browser, virus scanning, or wmp). This applies to playing the game too, just to be safe.