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This option sets the specified service which will be used for searching for updates.
/customActionBefore
WuInstall will execute the given action before it executes the other commands.
/customActionAfter
WuInstall will execute the given action after it has finished all other commands.
/checkAvailableDiskSpace drive_key:min_free_space(KB|MB|GB)
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This option prints the xml output after wuinstall has finished. It can also be used without any other command to display system information in xml format.
/retrycount
Specifies the number of retries on search failure.
Use this option when you try to update a machine which gets a lot of updates from a WSUS server. Obtaining a lot of updates from a WSUS can cause a search to fail (because of a limit from the WSUS which is not configurable). Perform multiple searches to get a result.