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Windows Update fails with 8000FFFF or 800B0100

October 26, 2014

I’ve had a problem with one of my companies servers where it just wouldn’t apply 55 updates and gave an awfully helpful 8000FFFF error code, which was a massive pain.  After some hunting around the internet I found this was due to permissions on the local C drive of the machine.  It was missing the BUILTINUsers Read permissions, after reapplying that permission (which took a while to apply to all the files!) the updates would then apply.

For more details see the article below:

Along the way I also had another problem where updates would stop applying with code 800B0100 which led me to yet another article and this time a patch that had to be applied, check the link out below

What a pain, but its fully fixed now at least.



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