I'm using Installshield Pro 2014. I have a basic MSI installer that needs to do a client or a server install. If it's a server install, I want to install a custom instance of SQL Express 2012. I set a custom action to launch the SQL installer and pass it all the command line instructions I need, but it hangs at Invoking QueryServiceStatus Win32 API Sco: Attempting to open SC Manager. I read that this is because SQL is trying to close something related to the MSI installer, but since my install application is an MSI, it can't close and gets hung. Any ideas on how to do this properly?