DirectX: frequently asked questions:
Do I need DirectX?
Yes. DirectX allows you to use multimedia software with complex sounds or moving images. DirectX is included with this version of Windows and with most of the games that require it.
Where can I get DirectX?
DirectX comes standard with this version of Windows, and also comes with most of the games that require it.
Which version of DirectX do I have?
At a minimum on this version of Windows, you have DirectX 10.
To check which version of DirectX you have
Click to open DirectX Diagnostic Tool.
Click the System tab, and then, under System Information, check the version number.
Can I uninstall DirectX?
No. It's an integral part of the Windows operating system and cannot be removed.
*Copied from Windows Help and Support. Run the DirectX Diagnostic Tool to see if it is functioning correctly.