Neowin

Windows 10 KB5048239 causes 0x80070643 error but Microsoft already has an official fix0 0

This past week, alongside the Patch Tuesday updates for November 2024, the company released its corresponding Setup and Recovery dynamic updates for Windows 11. However, it is also one of those rare ...
Neowin

Windows 10 KB5001716 install fails with 0x80070643 error but a fix seemingly exists

Earlier today, we noticed that Microsoft had quietly released a KB5001716 update for Windows 10 users. In a nutshell, it is meant to offer the next feature update for your PC. You can learn more about ...
ExtremeTech

Microsoft: Windows 10 April 2025 Update Error 0x80070643 Is Harmless, No Action Needed

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Bleeping Computer

Fake IT support sites push malicious PowerShell scripts as Windows fixes

Fake IT support sites promote malicious PowerShell "fixes" for common Windows errors, like the 0x80070643 error, to infect devices with information-stealing malware. First discovered by eSentire's ...
Ars Technica

Windows 10 failed to install an update - Error 0x80070643

I'm betting you could do a fresh install from the latest media creation tool and it will take care of it. I would hope so anyway. I think that is what I would do in your situation, backup everything, ...