Anything for sysadmins!


Windows Update encountered an unknown error – 80243004

This error just showed itself on my Windows 2008 R2 SP1 server and it stopped me from installing any updates. The fix for this error is undoubtedly the strangest I ever came across. Pete Long described this fix on his website.

Strangely enough this error seems to be caused by the taskbar that is not showing all icons. Here are the steps:

  1. Right-click the taskbar and select properties
  2. In the Taskbar tab click Customize…
  3. Check “Always show all icons and notifications on the taskbar
  4. Confirm all screens with OK

Now try installing the updates again and see that it’ll work.

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Posted by Mischa Oudhof

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