5] Repair your system files. One possible cause of the failure of Windows Update installation is the corrupted system image files. If this is the case with you, repairing the system image files ...

There were some problems installing updates, but well try again later. If you keep seeing this and want to search the web or contact support for information, this may help: (0x80070643).

The infamous "0x80070643 - ERROR_INSTALL_FAILURE" issue is back with one of the new Windows 10 updates KB5048239. Thankfully, there is a fix.

Microsoft is pushing out a Windows 10 KB5001716 update used to improve Windows Update that is ironically failing to install, showing 0x80070643 errors.

Microsoft has confirmed that it won't provide an automated fix for a known issue causing 0x80070643 errors when installing recent Windows Recovery Environment (WinRE) updates.

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