Windows 10 Anniversary Update Error Code 0xA0000400

I'm running Windows 10 Education (Build 10240), and when I attempt to manually update to the Anniversary Edition (Build 14393), I get an error code 0xA0000400. The update does not even attempt to install, as soon as I click "update now" it fails immediately with this message.
 

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Last updated February 21, 2019 Views 12,700 Applies to:
Answer

Updated (8/8/16):

Thank you for reporting this issue.  With your help, we were able to fix the issue that was causing error code 0xA000400 for customers with the Windows 10 Education edition.  If you were experiencing this issue, please re-run the upgrade from your desktop shortcut (Windows10UpgraderApp.exe).  If you don't have the shortcut, try updating again by going to the Software Download Page and clicking Update Now.

Paul

Paul Aaron

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