This is Microsoft’s DirectX driver library. It has been especially designed to improve graphic and sound capabilities in Windows. It improves video and audio reproduction. These drivers are essential for many games and they are highly recommended if you use your computer for multimedia activities.
The best feature of the latest versions of DIRECTX is their 3D graphics capability, which has been vastly improved. If you have a version of DirectX in your system, you will note only a small difference in the amount of space available on your hard drive, as new versions overwrite prior ones.
Some of the applications included in DIRECTX are:
Directsound, which reproduces and records sound waves.
Directsetup, which is used to install DirectX components
Directplay, which considerably improves Internet communications
Directinput, which is used to process keyboard, mouse and joystick data.
This set of tools is essential for take full advantage of your computer.