Windows Update error 0x80070666

If you receive Windows Update error 0x80070666 or 80070666 when you use Windows Update, you might have a previous version of Microsoft Office that is causing the error.

To resolve this problem, restart your PC, and then try checking for updates again.

If you get this error from a Microsoft Office update, then you'll need to remove and reinstall Microsoft Office.

If you continue to see this error, you can try searching the forums or asking a question on the Microsoft Community website.

Error codes this applies to:

  • WindowsUpdate_80070666

  • 0x80070666

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