Unattended setup has two modes: minimal interaction mode, and no interaction mode. The minimal interaction mode is specified using the /q switch (q is short for quiet). The no interaction mode is specified using the /qt switch (qt stands for totally quiet).
In minimal interaction (quiet) mode, the main setup window is displayed on the desktop, as well as the copy progress indicator and a dialog box that indicates whether Setup succeeded or failed. You must click OK to clear this dialog box. If Setup cannot resolve all issues based on the Msmqinst.ini files, Setup displays a message box to alert the user. The user can then correct the problem.
In contrast, Setup does not display any text or dialog boxes on the desktop in no interaction (totally quiet) mode. If a problem occurs, Setup writes an error in the Msmqinst.log file in the Windows folder (typically c:\Win95 or c:\Winnt) and quits.