TABLE 1: Windows Installer Switches for UI Levels
Switch UI Level
/qn No UI
/qb Basic UI
/qr Reduced UI with a modal dialog box displayed at the end of the installation
/qf Full UI with a modal dialog box displayed at the end of the installation
/qn+ No UI except for a modal dialog box displayed at the end of the installation
/qb+ Basic UI with a modal dialog box displayed at the end of the installation
/qb- Basic UI with no modal dialog boxes