XiaoDeer wrote:

It seems many people are experiencing Error 0x80070643 when installing KB5034441.

Apparently, it means that the recovery partition is too small. They want users to do this:

https://support.microsoft.com/en-gb/topic/kb5028997-instructions-to-manually-resize-your-partition-to-install-the-winre-update-400faa27-9343-461c-ada9-24c8229763bf

Yikes. How many folks will be able to manage that?

The consensus in other forums seems to be to wait until MS issue new guidance and/or a new update.

I just now saw your post, but a couple of hours ago my PC did a Windows 10 update. I just checked and this is the only one that failed:

Do I really have to do the complicated stuff in the link you provided?  Jeez.  Maybe I will wait and see if Microsoft fixes it.