When the Windows Installer Clean Up Utility dialog box is displayed, as shown in the screen on the following page, select the program or programs to clean up, and then click Remove. If you've already installed the Support Tools, you can run this utility by typing msicuu at the command line. It won't, however, remove this information from other profiles. Because of this, Windows Installer CleanUp Utility will remove user-specific installation data from this profile. Note Keep in mind that the profile of the current user is part of the Registry. It isn't, however, intended to be used as an uninstaller because it won't clean up the applications files or shortcuts and will make it necessary to reinstall the application to use it again. It is also useful for cleaning up applications that can't be uninstalled or reinstalled because of partial or damaged settings in the Registry.

It is most useful for cleaning up Registry remnants of applications that were partially uninstalled or whose uninstall failed. Windows Installer CleanUp Utility removes Registry settings for applications that were installed using the Windows Installer.

Windows installer cleanup