0x80070643 errors are seen in Windows Update while trying to install updates. This article explains how to fix this error.

This error almost always occurs in the Windows Update utility, usually accompanied by a larger message. Here are the two most common ways this error occurs:

Try these steps in the order given until the message disappears and the update is successful:

Try the installation again. Sometimes retrying the installation or update works, so it's worth at least trying again before you continue with further troubleshooting.