How To Fix Windows 10 KB5034441 update Problem 0x80070643 errors

Recently you have been facing Windows 10 KB5034441 update Problem 0x80070643 errors then dont worry this article is for you. In this article, we learn How To Fix Windows 10 KB5034441 update Problem 0x80070643 errors.

Installing Microsoft’s January Repair Tuesday updates is proving to be problematic for Windows 10 customers globally. Specifically, while trying to install the KB5034441 security update for BitLocker security users are encountering 0x80070643 issues.

Yesterday, Microsoft released KB5034441, a security update, as part of their January 2024 Patch Tuesday.. This update addresses CVE-2024-20666, a BitLocker encryption breach that permits users to access encrypted data.

However, Windows 10 customers are experiencing 0x80070643 issues and installation failures when trying to install this update.

Users will see a Windows Update box after restarting, informing them that an error occurred and asking them to try again later.

“We’ll give it another go later. There were some issues with the update installation. This can be helpful if you want to look up information online or get in touch with help if you keep seeing this: (0x80070643),” the Windows Update problem says.

Microsoft alerts users in a support note released yesterday that if the Windows Recovery Partition is not big enough for the update, they should encounter the “Windows Recovery Environment servicing failed, (CBS_E_INSUFFICIENT_DISK_SPACE)” issue when installing KB5034441.

Instead, the Windows Update displays a typical “0x80070643 – ERROR_INSTALL_FAILURE” error message due to a coding problem.

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WinRE partition is too little

Microsoft is deploying a new version of Windows Recovery Environment (WinRE) that addresses the BitLocker issue when you install the KB5034441 security update.

Sadly, Windows 10 creates a recovery partition that is typically 500 MB in size. This partition is unable to hold the new Windows RE image (winre. wim) file, which results in the 0x80070643 problem while trying to install the upgrade.

In a test conducted this morning by BleepingComputer, a fresh Windows 10 install using the most recent Microsoft ISO generated a 522MB WinRE disc. Even so, the partition on this fresh install is too tiny, which prevents the KB5034441 security update from installing and results in a 0x80070643 error.

Right now, the only fix provided by Microsoft is to increase the Windows Recovery Partition to provide sufficient space for the security update to be installed.

Because the C: partition and the Windows Recovery Partition are produced on the same disc, you need to reduce the size of the C: partition by 250 MB and use the newly freed-up space to make a larger Recovery Partition.

To handle WinRE security updates, Microsoft had earlier released a support notice detailing how to use the command line utilities reagentc.exe and diskpart.exe to decrease the C: partition by 250 MB and establish a new Recovery Partition.

Diskpart.exe is a command line utility for managing the device’s disc partition and volumes. While reagentc.exe is a command line application for controlling the Windows Recovery Environment.

However, because the issue needs physical use of your device, we highly advise you not to execute these actions if you are uncomfortable with command-line programs.

Waiting for a Microsoft solution, which might include an automatic method to construct a larger Windows Recovery disc, is the better course of action.

Microsoft’s provided solution

• Start a Command Prompt window as administrator (cmd).
• Run reagentc/info to see the current state of WinRE. A “Windows RE location” containing the path to the WinRE directory is required if the WinRE is installed. For instance, “Windows RE location: [file://%3f/GLOBALROOT/device/harddisk0/partition4/Recovery/WindowsRE]\?\GLOBALROOT\device\harddisk0\partition4\Recovery\WindowsRE.” Here, the index of the disc and partition that contain WinRE is the number that comes after “harddisk” and “partition“.
• Run reagentc /disable to turn off the WinRE
• Reduce the size of the OS partition and get the disc ready for a fresh recovery partition.
  • Use diskpart to reduce the OS’s size.
  • Launch the list disc
  • Use a disk to choose the OS disc. The disc index here should match that of WinRE.
  • Run the list part to locate the OS partition and examine the partition beneath the OS disc.
  • Use the sel part command to choose the OS partition.
  • Run shrink minimum = 250, desired = 250
  • Use the sel part command to choose the WinRE partition.
  • Use delete partition override to remove the WinRE partition.
• Partition the drive for recovery again.
  • First, identify if the disc partition style is a Master Boot Record (MBR) or a GUID Partition Table (GPT). Use a list disc to do it. Verify if the “Gpt” column has a star () symbol. The drive is GPT if it has a star () on it. Otherwise, MBR is the drive type.
    • Run the create partition primary id=de94bba4-06d1-4d40-a16a-bfd50179d6ac command after gpt attributes =0x8000000000000001 if your disc is GPT.
      • Use the create partition main id=27 command if your disc is MBR.
  • Use format quick fs=ntfs label=”Windows RE tools” to format the partition.
• Run list vol to verify that the WinRE partition has been created.
• Use exit to leave diskpart.
• Run reagentc /enable to reactivate WinRE.
• Run reagentc /info to verify the installation location of WinRE.

To attempt installing the KB5034441 security update once more. Restart Windows after finishing these instructions and look for updates in Windows Update.

sadly, a Windows 10 user has informed BleepingComputer that their device’s update failed, but has a 1 GB Windows RE drive. As a result,  these actions will fix the problem.

Microsoft makes a script available for installation

Microsoft has made available PowerShell scripts that automate the Windows 10 Windows Recovery Environment (WinRE) BitLocker CVE-2024-20666 security patch installation.

These scripts mount the WinRE partition, copy over the images from a dynamic update, and then unmount the partition once more. Instead of installing the KB5034441 update.

The BitLocker patch and the most recent files will be present in the WinRE partition. so these PCs will no longer require the KB5034441 upgrade.

Microsoft provides direct download links for each of these scripts. One is available for Windows 10 2004 and later, while the other is for Windows 1909 and older.

Sadly, Windows Update will keep attempting to install the KB5034441 update even after this PowerShell script has been executed. Which will result in recurrent issues being shown.

If you installed the BitLocker fixes using a PowerShell script, you should be able to hide the KB5034441 update using Microsoft’s Show or Hide Tool. This will prevent Windows Update from presenting it to you.

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