Windows 10/11 Update KB5034441 Is Still Broken? Fix It Now!

KB5034441 Update Failed: 0x80070643

KB5034441 is a security update for Windows Recovery Environment (WinRE), enabled on systems with a recovery partition. This update automatically applies Safe OS Dynamic Update (KB5034232) to the WinRE on a running PC to address a security vulnerability that could allow attackers to bypass BitLocker encryption by using WinRE.

However, when installing KB5034441 update, some users receive an error message titled “0x80070643 – ERROR_INSTALL_FAILURE”.

Why does error 0x80070643 occur? It can be caused by insufficient free space on the recovery partition. Microsoft has emphasized that KB5034441 update requires 250 MB of free space in the recovery partition to install successfully. How to fix it? Please keep reading.

Backup Before Making Any Changes

To fix “0x80070643 – ERROR_INSTALL_FAILURE”, you may extend the recovery partition. Before embarking on any modifications to your partitions, it's essential to safeguard your data with a reliable backup solution. AOMEI Backupper Standard stands out as a robust choice for ensuring the integrity of your files and system settings.

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To create a system image so that you can restore computer to an earlier date when serious problems occur, please click Backup > System Backup.

How to Install KB5034441 on Windows 10/11 Successfully

As mentioned above, you need to extend the recovery partition to fix error 0x80070643. Although Microsoft suggests increasing the partition size slightly, increasing it to 2 GB has proven more effective. Here are two ways to go.

Method 1: Recreate Bigger Recovery Partition via CMD

1. Open a Command Prompt window (cmd) as admin.

2. Type reagentc /info to check the WinRE status.

3. (Optional) Type reagentc /disable to disable the WinRE if it is enabled now.

4. Shrink the OS partition and prepare the disk for a new recovery partition. Please type the following commands in order.

• diskpart
• list disk
• sel disk 0 (“0” is the OS disk index)
• list part
• sel part 3 (Replace “3” with the index of the partition which has enough space)
• shrink desired=2000 minimum=2000

5. Type sel part 4 (“4” is the WinRE partition index) to select the WinRE partition.

6. Type delete partition override to delete the WinRE partition.

7. Create a new recovery partition.

• If your system disk is a GPT disk, run create partition primary id=de94bba4-06d1-4d40-a16a-bfd50179d6ac followed by the command gpt attributes =0x8000000000000001
• If your system disk is an MBR disk, run create partition primary id=27

Note: You can check your system disk partition style in the section after you run the “list disk” command. If there is an asterisk character (*) in the “Gpt” column, then the drive is GPT. Otherwise, the drive is MBR.

8. Run format quick fs=ntfs label=“Recovery” to format the partition.

9. Run list vol to confirm that the WinRE partition is created.

10. Run exit to exit from diskpart.

11. Run reagentc /enable to re-enable WinRE. Then, run reagentc /info to confirm where WinRE is installed.

12. Restart your computer and try installing the KB5034441 update again.

Method 2: Extend Recovery Partition via Third-Party Tool

Besides using CMD, the best disk and partition management tool - AOMEI Partition Assistant Professional can also give you a hand. Follow the instructions below to extend recovery partition using AOMEI Partition Assistant.

1. Install and launch AOMEI Partition Assistant Professional. Right-click on a partition that has enough storage space, and select the Allocate Free Space feature.

2. Preset the amount of free space you wish to allocate and choose the recovery partition as the destination. Hit OK.

3. Hit Apply > Proceed to execute the operation.

4. Restart your computer and try installing the KB5034441 update again.

Summary

If you encounter the “0x80070643 – ERROR_INSTALL_FAILURE” issue when installing KB5034441 update, don’t worry. Follow the two solutions offered in this article to get it fixed. Don’t forget to backup your computer before you make any changes to your partitions. This step is important for data security.

Actually, AOMEI Backupper is not only Windows backup software but also the best SSD data migration software. Give it a try and you won’t regret it!