WSUS Updates Fails on clients Error 800F826 RRS feed

  • Question

  • Hi,

    I have WSUS 3 SP 2 with installation version 10.0.14393.479 on windows server 2016

    I didn't had any problem with distributing updates to clients and clients was installing updates perefectly

    But now all clients are failing to install updated with error 800F826 

    Thanks anyone for helping me to solve this


    Saturday, July 29, 2017 10:44 AM

All replies

  • Have a peek at my Adamj Clean-WSUS script. It is the last WSUS Script you will ever need.


    What it does:

    1. Remove all Drivers from the WSUS Database.
    2. Shrink your WSUSContent folder's size by declining superseded updates.
    3. Remove declined updates from the WSUS Database.
    4. Clean out all the synchronization logs that have built up over time (configurable, with the default keeping the last 14 days of logs).
    5. Compress Update Revisions.
    6. Remove Obsolete Updates.
    7. Computer Object Cleanup (configurable, with the default of deleting computer objects that have not synced within 30 days).
    8. Application Pool Memory Configuration to display the current private memory limit and easily increase it by any configurable amount.
    9. Run the Recommended SQL database Maintenance script on the actual SQL database.
    10. Run the Server Cleanup Wizard.

    It will email the report out to you or save it to a file, or both.

    Although the script is lengthy, it has been made to be super easy to setup and use. There are some prerequisites and instructions at the top of the script. After installing the prerequisites and configuring the variables for your environment, simply run:

    .\Clean-WSUS.ps1 -FirstRun

    and then

    .\Clean-WSUS.ps1 -InstallTask

    If you wish to view or increase the Application Pool Memory Configuration, you must run it with the required switch. See Get-Help .\Clean-WSUS.ps1 -Examples

    If you're having trouble, there's also a -HelpMe option that will create a log so you can send it to me for support.

    Adam Marshall, MCSE: Security

    Sunday, July 30, 2017 6:53 PM
  • Hi ,

    If it is possible , please download a monthly cumulative windows update and manually install it for a test client .

    Then check if the client can work with WSUS server . 

    Best Regards,


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    • Edited by Elton_Ji Monday, July 31, 2017 5:00 AM
    • Proposed as answer by Elton_Ji Sunday, August 13, 2017 3:12 PM
    Monday, July 31, 2017 5:00 AM