Wuauclt Usage

 WUAUCLT.EXE 

A command line utility to control the Windows Update Automatic Update CLient

This utility is provided for all Windows operating systems prior to the release of Windows 10/Server 2016. It provides the ability to invoke an update scan or report statistics to a WSUS (Windows Software Update Service).

For reasons known only to Micrososoft, they did not include a help option (/?) as one of  the parameters for this utility. I've only listed options that have a known effect to the client.

• /DetectNow - To run an immediate poll of the WSUS server for updates
• /resetAuthorization - To reset the authorization on the server and the client. In fact, it is a new registration on the WSUS server. Useful when the client registraation is corrupt, deleting it on the server and the command wuauclt /detectnow /resetAuthorization re-registered on the server with simultaneous request for list of updates
• /reportnow To reset the statistics on the server the Other parameters are not so obvious and, most importantly, their application is not clear and usually causes no change
• /ShowSettingsDialog - Displays the dialog to set the schedule for the installation of the updates
• /ResetEulas - to reset the EULA for updates
• /ShowWU - go to website of MS updates
• /ShowWindowsUpdate - go to website of MS updates
• /UpdateNow - Immediately starts the update process, clicking the same button in the notification window when updates are available.
• /ShowWUAutoScan - unknown
• /ShowFeaturedUpdates - unknown
• /ShowOptions - unknown
• /ShowFeaturedOptInDialog - unknown
• /DemoUI - Show icon in tray - settings dialog schedule the installation of updates or setup, depending on the status.