/? - Display this usage message. /lang: - Install the specified language pack. Language is specified as a three letter abbreviation ...

/? - Display this usage message. /lang: - Install the specified language pack. Language is specified as a three letter abbreviation (e.g. ENU, DEU, JPN, ...). Only one language is supported. Specifying /lang:ENU skips any language pack installation. /passive - Never block on user input. Short form: /qb /norestart - Never schedule a restart. Returns exit code 3010 when a restart is required. /quiet - Hide all UI. Short form: /q /progress  - Specify a pipe through which events are raised; used for building custom UI. /uninstall  - Uninstall the specified product. Same as: /remove