Check the DirectX diagnostic to see if there are any identifiable problems. The most current version is DirectX 9.0c and this is updated through the Windows Update page (Internet Explorer/Tools/Windows Update)
Click Start
Click Run
Type in: dxdiag
Click OK
OK the WHQL dialog box
Check to see if your DXDIAG utility version is the most current.
Once the diagnostic tool loads look for any noted "problem" files.
Run the tests for both the graphics display and the sound.
If there are problems noted, try using the More Help section.
If no problems are indicated, try turning down the (grahpics and/or sound) acceleration rate slightly (if that is an option). Try the game again and see if that made any difference.
If nothing here helps, please post again with the test results. Also, please provide some information about the computer (make/model/Operating System, etc.).
I hope something here will help and welcome to Answerpool.com.
Dwight