Nothing is going on with the silent installer, I tried a theory and it did not work (probably because msistub launcer does not work on x64.) You are going to have to learn how to use the CMD to run the msi and use the TRANSFORMS switch to install alky without the nlsdl. Or you could edit the MSI with Orca to remove the nlsdl from the install table, heres how: Delete the InstallNLSAPI from the CustomAction Table