To determine the version of DirectX installed on your computer:
1. Start / Run / dxdiag / OK.
2. Record the the version information from the DirectX Version line on the System tab.
3. Select the DirectX Files tab.
4. Verify that the version information on each DirectX file is consistent, and that the Notes box contains No problems found.
5. Press Exit.
NOTE: If dxdiag is NOT found, you have an old version of DirectX installed. Download and install the current version of DirectX.