WSUS tools and troubleshooting

There are a number of tools you can use for WSUS troubleshooting and testing.

  1. The first one is available on all clients, as it’s a client based tool – wuauclt.exe

    The following are a list of options.


    If you copy this to a text file and save it as *.bat, when run on a client machine, it will reset WSUS settings on the client machine and force it to check now for updates. This will speed up the checking process drastically.
    You will need reg.exe if you are running this on an old machine, e.g. Windows XP or Windows Server 2003.

    @echo on
    \\comutername\wsustools\reg.exe %windir%\system32 /Y
    net stop wuauserv
    REG DELETE "HKLM\Software\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update" /v LastWaitTimeout /f
    REG DELETE "HKLM\Software\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update" /v DetectionStartTime /f
    Reg Delete "HKLM\Software\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update" /v NextDetectionTime /f
    Reg Delete "HKLM\Software\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update" /v UnableToDetectTime /f
    Reg ADD "HKLM\Software\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update" /v AUState /t REG_DWORD /d 2 /f
    net start wuauserv
    wuauclt /detectnow

  2. Another tool on the client you can use the Microsoft client diagnostic tool –

    Download and install on the client, then run the ClientDiag.exe tool, this will display a number of PASS/FAIL results in a comment prompt.

    Very handy tool to use to test the URL of WSUS either HTTP or HTTPS.

  3. The other tool you can use is server based, it is called WSUSutil.exe. WSUSutil.exe is located in the %drive%\Program Files\Update Services\Tools folder on your WSUS server

    More information can be found here –

  4. Another troubleshooting tip is to check the c:\Windows\WindowsUpdate.log file on the client, this has a running log on all Windows Update events.

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