If you get the error "Application cannot be started. Please contact the application vendor" when attempting to install either the Windows Server or Media Browser Theater, please try the following:
Clear your ClickOnce Cache by running the following command at a command prompt on the problem machine:
rundll32 dfshim CleanOnlineAppCache
ClickOnce is a Microsoft Deployment Technology that we use to deliver our installer and ensure that all required 3rd-party components are also installed on the target machine.
Next: Disable Internet Explorer Enhanced Security. See http://www.visualwin...-Security-2008/
In very rare cases, even the above won't work. If this is still the case for you, the other only solution Microsoft has is to re-create the user profile on the machine.
Finally, if you're running Windows 7, ensure that Service Pack 1 (SP1) is installed. You can do this using Windows Updates.