Summary

A silent, or unattended installation is one that presents no user interface.

Discussion

To run an installation silently, run msiexec with the /qn command-line option, as in the following.

msiexec /i C:\Sample.msi /qn

The /q option specifies the level (quiet) of user interface to display, and the n specifies that no interface should be displayed.

Here are some command-line switches that are available with the /q option as documented by Microsoft:

Command	Description
q , qn	No UI.
qb	Basic UI. Use qb! to hide the Cancel button.
qr	Reduced UI with no modal dialog box displayed at the end of the installation.
qf	Full UI and either SetupCompleteError, SetupInterrupted or SetupCompleteSuccess modal dialog box at the end.
qn+	No UI except for a modal dialog box displayed at the end.
qb+	Basic UI with a modal dialog box displayed at the end. The modal box is not displayed if the user cancels the installation. Use qb+! or qb!+ to hide the Cancel button.
qb-	Basic UI with no modal dialog boxes. Please note that /qb+- is not a supported UI level. Use qb-! or qb!- to hide the Cancel button. Note that the ! option is available with Windows Installer 2.0 and works only with basic UI. It is not valid with full UI.

To silently run a setup program that uses Setup.exe, a user can enter the following command:

setup.exe /s /v"/qn"

The following Microsoft article has additional information on the Command-Line Options for msiexec.exe and the User Interface Levels.

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