I am using Advanced Installer version 14.2 and notice that there is a dialogue in the Dialog table named BasicUIDlg. What's it for? It's a different size to all the other dialogues, does not appear in the Dialogs panel (hence will never be seen), can't be inserted in the dialog sequence and can't be edited, contrary to what it says in this thread. I have searched the online help and it's not mentioned. I have searched the forum and it's only mentioned once (in the above thread). Can I safely delete it (if that's even possible) or does it serve some insidious purpose? If it serves a purpose, it should be documented.
The dialog in question is used for Basic User Interface. This option directs Windows Installer to display only a dialog with a progress bar showing the evolution of the installation and the message boxes that display error messages. It is used especially for unassisted or automated installs (e.g. deployment through Group Policy).
You could run the MSI with basic UI using the "/qb" command line.