Uninstalling the Windows Phone SDK 8.0 will break XNA Game Studio 4.0 and vice versa

The XNA Game Studio components that are installed as a part of the Windows Phone SDK 8.0 have a setup bug that causes the uninstall process for the Windows Phone SDK 8.0 to break XNA Game Studio 4.0 and vice versa.

How to fix XNA Game Studio 4.0 if you uninstall the Windows Phone SDK 8.0

If you have both the Windows Phone SDK 8.0 and XNA Game Studio 4.0 installed and then uninstall the Windows Phone SDK 8.0, you will need to do the following to restore XNA Game Studio 4.0 functionality:

  1. Go to the Programs and Features control panel and uninstall the item named Microsoft XNA Framework Redistributable 4.0 Refresh.
  2. Go to the Programs and Features control panel and repair the item named Microsoft XNA Game Studio 4.0 Refresh.

How to fix the Windows Phone SDK 8.0 if you uninstall XNA Game Studio 4.0

If you have both the Windows Phone SDK 8.0 and XNA Game Studio 4.0 installed and then uninstall the XNA Framework Redistributable 4.0 component that is installed as a part of XNA Game Studio 4.0, you will need to repair the Windows Phone SDK 8.0 to restore XNA Game Studio functionality in the Windows Phone SDK 8.0.