Allows you to disable Windows Messenger. If you enable this setting, Windows Messenger will not run. If you disable or do not configure this setting, Windows Messenger can be used. Note: If you enable this setting, Remote Assistance also cannot use Windows Messenger. Note: This setting is available under both Computer Configuration and User Configuration. If both are present, the Computer Configuration version of this setting takes precedence. Fix: (1) GPO: Computer Configuration\Administrative Templates\Windows Components\Windows Messenger!Do not allow Windows Messenger to be run (2) REG: HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Messenger\Client!PreventRun