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====== WSUS client commands and settings ======


The '' **wuauclt /detectnow** '' option initiates a detection on all systems, the behavioral differences are a function of the setting of the Configure Automatic Updates policy.

If AUOption='4' (as you have for your workstations), the command will detect available updates, automatically queue updates for download via BITS, and automatically schedule those updates for installation at the configured time when the download has been successfully completed.

If AUOption='3' (Notify for Install), the command will detect available updates, automatically queue updates for download via BITS, and then (on WinXP/2003) present a notification to any logged on Administrator inviting them to install the updates or (on Vista and later) present and enable the Install Updates button in the Control Panel WUApp for any user who is not restricted from installing updates.

If AUOption='2' (Notify for Download), the command will detect available updates and (on WinXP/2003) present a notification to any logged on Administrator inviting them to download the updates or (on Vista and later) --- Hmm... actually, I've never personally see the WUApp on a machine configured with AUOption-'2'! --- but my expectation would be that the WUApp presents a "Download Now" button, rather than an "Install Now" button.

By default, the WUAgent executes a detection 17.6-22.0 hours after the completion of the previous regular detection event. Using wuauclt /detectnow causes the previously scheduled detection to be 'rescheduled' 17.6-22.0 hours after the completion of the on-demand event. The detection interval can be configured in policy to a shorter interval, but should be matched (logically) with your server synchronization event, and your approval processes. If your server is set to synchronize once-per-day, and your approval process is not a daily occurrence, there is NO value in setting the interval to a shorter value. If your server is set to synchronize more than once per day and you approve updates on a daily basis, there may be value in setting the detection interval to a shorter period, consistent with the server synchronization interval.


**__Force Detection of Updates and Report to the WSUS Server:__**
<code bash>
wuauclt.exe /detectnow /reportnow
</code>

**__Windows Update Log (Checking Errors/Process Status):__**
<code bash>
%WINDIR%\WindowsUpdate.log
</code>

**__Cleanup all cached files and force detection:__** 
<code bash>
net stop wuauserv 
rmdir /S /Q C:\winnt\softwaredistribution 
net start wuauserv 
wuauclt.exe /resetauthorization /detectnow
</code>

**__Delete winhttpproxy settings:__** 
<code bash>
proxycfg -d
</code>

<code bash>
wuauclt /detectnow /register /reportnow
</code>
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