If you want to update 9.0c and previous versions of DirectX, you should download DirectX End-User Runtime — the core Windows® technology that drives high-speed multimedia and games on your computer.

Generally, the terminal installation not only contains the latest but also the previous released DirectX runtime. For example, this may include the bi-monthly D3DX, XInput, and Managed components. However, once been installed, this software cannot be unloaded.  It is widely used when we are going to build 3D animation and characters movements’ computer games. read more