The XNA Framework Redistributable will provide game developers with the XNA Framework run-time libraries, which they can include with their application for redistribution on the Windows platform.
The XNA Framework Redistributable has all the necessary runtime components to execute a game, which was developed using Microsoft XNA Game Studio 4.0.
Version 4.0 of the framework contains improved functionality and new features.
Note: if developers have Microsoft XNA Game Studio 4.0 already installed then this runtime is not necessary.
Microsoft XNA Framework Redistributable 4.0