How to Resolve Windows Update Error 0x80070643

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Understanding Windows Update Error 0x80070643

Microsoft frequently rolls out updates for Windows to enhance features and address bugs. While updates generally proceed without issues, some users encounter errors during the download process, such as the 0x80070643 error with update KB5034441. In this guide, we’ll explore how to efficiently resolve this common Windows Update error.

Steps to Fix Windows 10 Error 0x80070643 ✅

The 0x80070643 error typically arises when there’s insufficient space in the Recovery partition. By freeing up 250 MB in the WinRE (Windows Recovery Environment) partition, you can successfully install the KB5034441 update. Follow these steps:

1. Open CMD Command Prompt and enter reagentc /disable.
2. Enter diskpart and type list disk.
3. Select the disk where Windows is installed.
4. Type list partition and select the primary disk partition.
5. Type shrink desired=250 minimum=250.
6. Select the Recovery disk partition.
7. Delete it using delete partition override.
8. If your disk is GPT, type create partition primary id=de94bba4-06d1-4d40-a16a-bfd50179d6ac.
9. Enter gpt attributes=0x80000000000000000001.
10. If your disk is MBR, type create partition primary id=27.
11. Format the partition with format quick fs=ntfs label=”Windows RE tools”.
12. Verify creation with list vol.
13. Exit by typing exit and enable with reagentc /enable.

To confirm proper configuration of the recovery partition, type reagentc /info. If “Enabled” is displayed next to Windows RE, the Recovery partition is correctly set up. Restart your computer and attempt the Windows update again; the 0x80070643 error should no longer appear.

Importance of Installing Windows 10 KB5034441 Update 🤔

Released in January 2024, update KB5034441 is crucial for systems using Windows Recovery Environment (WinRE). It automatically applies Secure OS Dynamic Update to fix a vulnerability that could allow attackers to bypass BitLocker encryption via WinRE. Downloading and installing KB5034441 is essential for security, provided your system has a Recovery partition. If not, you can disregard the error.

Microsoft has not issued a direct fix for error 0x80070643. While many bugs are patched through subsequent updates, others like this one require manual intervention. Follow the outlined steps to resolve the 0x80070643 error during the KB5034441 security update installation on Windows 10.