KB5034441 Was Retired: What to Do About Old 0x80070643 Errors

KB5034441 is no longer a current update. Microsoft retired it on August 13, 2024 and moved the guidance to KB5042320. An old failed-install entry in Update History is not a reason to resize or delete your recovery partition.

Check what is failing now

1. Open Settings → Windows Update and check for updates available to your device.
2. Read the KB number and error on the current failure. Update History can retain an older failed attempt even after the update is superseded.
3. Consult the support page for that exact update. Requirements vary with your Windows version and installed WinRE image.

0x80070643 means an installation failed; it does not by itself prove the recovery partition is too small.

Check the recovery environment

In an administrator Command Prompt, this read-only command shows WinRE status and location:

reagentc /info

For WinRE version and applicability checks, follow Microsoft’s KB5042320 guidance.

When partition work is relevant

Only consider a partition change if the applicable current update and Microsoft’s diagnostics establish insufficient recovery space. Back up first and follow Microsoft’s procedure for the actual disk layout. Avoid deleting a partition to clear a historical KB5034441 failure.

This page previously presented repartitioning as a current fix for KB5034441. That advice has been removed because the update is retired.