If you play games or watch videos on your computer, you may want to make sure that you download and install the latest version of Microsoft DirectX software. DirectX is a group of technologies designed to give you best performance from your graphics and sound hardware. Its also a standard among developers of multimedia applications.
To find out what version of DirectX your system is using, from the Run... command type "dxdiag" and press Enter. This will run the DirectX Diagnostic Tool, and display information about your computer's hardware and the version of the OS and software that its running.
To obtained the latest version of DirectX visit the Microsoft DirectX site.