Sample command to install / reinstall / patch a Data Collector:

VideoOS.DataCollector.Installer_x64.msi INSTALLDIR="C:\Program Files\Milestone\XProtect Data Collector Server" ACCOUNTNAME="NT AUTHORITY\NETWORK SERVICE" USERACCOUNT="false" SERVERHOSTNAME="http://localhost/" SERVERPORT="80" ARPSYSTEMCOMPONENT="1" LANGUAGE="en-US" ACCEPTSTATISTICS="no" REBOOT=Suppress