This installation package could not be opened. Verify that the package exists and that you can access it, or contact the applikcation vendor to verify that this is a valid Windows Installer package." How to fix this installation error?
Does anyone know, how to fix ' This installation package could not be opened. Verify that the package exists and that you can access it, or contact the applikcation vendor to verify that this is a valid Windows Installer package." ?