Unexpected revenant: Windows 10 update fails with code 0x80070643

Last year there were already error messages during Windows updates with the code 0x80070643. Now it is occurring again.

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Last year, Microsoft had problems with Windows updates that could not be installed with the error code 0x80070643. The company has since given up on automatic attempts to solve the problem. Now the error code is appearing again, this time affecting the April security patches for Windows 10.

Microsoft points this out in the Windows Release Health Notes. “After installing the Windows Recovery Environment Update from April (KB5057589), you may see the following error message on the Windows Update settings page: 0x80070643 – ERROR_INSTALL_FAILURE”. However, Microsoft assures you that this error message is not correct and has no influence on the update or the device functions.

The Windows Recovery Environment (WinRE) is a repair environment that can fix common reasons for operating systems not starting. The error occurs when the device installs the WinRE update when another update has flagged the system for a pending reboot. Even if the error message suggests that the update has not been fully applied, it will typically install successfully if the device reboots, Microsoft explains further.

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Windows Update may continue to show the update as failed until the next daily scan, when it will no longer be offered and the error message will be automatically cleared. Nevertheless, Microsoft writes that the developers are working on a solution. Windows 10 22H2 and 21H2 as well as Windows Server 2022 are affected.

After such errors occurred last year and attempts to solve them often failed, Microsoft officially gave up the search for automatic solutions to the problem. However, manual attempts were still available to help those affected.

(dmk)

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This article was originally published in German. It was translated with technical assistance and editorially reviewed before publication.