/SILENT Runs the installer in silent mode (The progress window is displayed)
/VERYSILENT Very silent mode. No windows are displayed.
/SUPPRESSMSGBOXES Suppress message boxes. Only has an effect when combined with '/SILENT' and '/VERYSILENT'.
/NOCANCEL Disables cancelling the installation process.
/NORESTART Prevents installer from restarting the system even if it's necessary.
/DIR="x:\dirname" Overrides the default install directory.

Example

Silently install the program, prevent restarting the system.

setup.exe /VERYSILENT /SUPPRESSMSGBOXES /NORESTART