22h2 For X64-based Systems

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Gaby Zenz

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Aug 4, 2024, 6:48:35 PM8/4/24

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Microsofthas confirmed Windows 10 KB5034441 update fails to install with 0x80070643. To fix this issue, you must resize the WinRE using Command Prompt and reboot. For those unaware, a recovery partition is typically configured by OEMs to repair, restore or reinstall Windows.

On January 9, Microsoft published a cumulative update KB5034441 to fix security issues in the Windows Recovery Environment (WinRE), which powers your recovery partition. This mandatory security update patched a critical issue that could allow attackers to bypass BitLocker encryption and access your sensitive files by exploiting WinRE.

Unfortunately, many people told us they could not install Windows 10 KB5034441 due to the 0x80070643 error. In Feedback Hub and our comments section, many users complained the update is constantly failing. One person said they tried many things, like reinstalling Windows, but nothing worked.

Additionally, another user detailed their unsuccessful experience with the January 2024 security update for Windows 10, version 22H2, on x64-based systems. Despite using the Windows Update troubleshooter to fix corruption, the update still failed to install, posing a significant inconvenience.

In our tests, we observed that the update fails to install when it detects the recovery partition drive does not have sufficient free space. As per updated documents, Windows recovery partitions must have at least 250 MB of free space.

If you run into error 0x80070643 when installing the latest update, you may need to increase the size of the WinRE partition and check for updates again. Additionally, Microsoft clarified that new WinRE updates now require 250MB of free space in the recovery partition.

Mayank Parmar is an entrepreneur who founded Windows Latest. He is the Editor-in-Chief and has written on various topics in his seven years of career, but he is mostly known for his well-researched work on Microsoft's Windows. His articles and research works have been referred to by CNN, Business Insiders, Forbes, Fortune, CBS Interactive, Microsoft and many others over the years.