This configuration variable applies only to the thin client automatic update feature. The keywords or numeric values in the TC_INSTALLER_UI_LEVEL configuration variable control the Windows installer interface.

TC_INSTALLER_UI_LEVEL setting     Result
NONE or "0" Windows installer does not display a user interface.
UNATTENDED or "1" Windows installer displays informational and progress messages, but executes unattended.
INTERACTIVE, DEFAULT, or "2" Windows installer prompts for and accepts user input for the installation process.
REDUCED or "3" Results in a reduced user interface.

See Accepting the Automatic Update for more information about this variable.