When I test my installer, I launch it by a double-click on its exe file in Windows File Explorer. What happens then is that the installation process starts, but the installer's "Welcome" dialog is displayed below the File Explorer window. If it weren't for the flashing task bar symbol, I would wait forever for something to happen on the screen. I would expect the "Welcome" dialog (and all subsequent dialogs) to be displayed on top of anything currently visible on the desktop.
This occurs on a Windows 7 machine as well as on Windows 8.1 and Windows 10. The installer was created using AI 15.7.
Looking forward to your suggestions
Hans