After you're back to your desktop, you should run DXDIAG and go thru the tests:
1) Choose Run under the Start menu
2) Type
dxdiag3) Page through and take all the tests, and note any problems it tells you about. (You can ignore any of the "unsigned" errors, but make a note of them anyway - there could be updates).
You may then want to consider updating your audio/video drivers:
From
MS DirectX FAQ :
How do I uninstall DirectX?
DirectX 9.0 is a system component and cannot be uninstalled. If there is a problem with the DirectX installation, it can normally be resolved by shutting down all running applications and reinstalling. As mentioned previously, DirectX 9.0 is fully backward-compatible with titles written for previous versions of DirectX. If you are having other problems after installing DirectX 9.0, these can often be resolved by installing updated drivers for your display card, audio card, or input device.
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