KB5034441 failing to install with "Retry" 0x80070643

Windows 10 2024-01 Security Update for Windows 10 Version 22H2 for x64-based Systems (KB5034441) failing to install with “Retry” 0x80070643

 

 

Problem:

The January 2024 update is known to fail on a widespread basis. Currently as of Feb 21 2024, this is still unmitigated in any automatic fashion via Windows Updates; however, it can be simply fixes with a Powershell script as provided directly from Microsoft.

Solution:

Copy/Paste the script provided in this link into a file named something like patch.ps1.
https://learn.microsoft.com/en-us/windows-hardware/manufacture/desktop/add-update-to-winre?view=windows-11#extend-the-windows-re-partition
Execute the script for an elevated cmd.exe shell (Run as Administrator) using the commandline PowerShell.exe -ExecutionPolicy Bypass -File patch.ps1. (Either spefify the full file-path or make sure to cd into the folder where you have saved the script).
When asked for a BackupFolder, c:\temp will suffice. When asked if you wish to proceed, answer Y (Yes).
Upon completion, reboot with shutdown /r /f /t 5.

Rejoice.