Windows update (KB5034441) Error (0x80070643)

That's not encouraging to hear! How much disk did you allocate? I over-allocated due to the disk already having a lot of unallocated space, i.e. I didn't need to shrink anything, just remove the previous recovery partition, thankfully the last partition, and then create fresh but larger.

I am casting my memory back some weeks now, but I seem to recall there was a 250Mb recovery partition with next to no usage. The advice is to resize by 250Mb, but from memory, given all the unallocated space, I created a new partition of 1Gb and it all worked. And it also used something absurd like 50Mb after the update was done.

I could check on the other machine on what space finally was used ... certainly AFTER the update the used recovery partition space was considerably less that the ORIGINAL partition size

I could not complete a delete and re-create of this partition as it is part of my boot drive and the command "delete partition override" is not allowed, will not work. So to do this would require a boot off the System Drive to a CD or USB. I will try that perhaps. Would like to see Microsoft fix this as I have three computers that have the same problem. I could try a ESD reformat to see if this might work. If the Recovery Partition just is recreated to the same size, the same problem will be there. I will get a Boot Disk and try to get around the MS issue with changing the Win Boot Drive.

I had this on one machine. It had had an HDD replacement some time back and then the old image copied back onto the new larger disk. This meant there was lots of free space and so I followed the MS instructions and removed (from memory) a 250Mb recovery partition and added 1Gb. The update did then run ... but only used a fraction of the space ... meaning there was WAY more space than necessary on the original partition. Further, the new recovery partition now shows in Win Explorer rather than being hidden. So yes it worked, but no, it seems entirely unnecessary as the extra space granted wasn't necessary.

Now have this on another machine. This doesn't have a lot of unallocated space and so it will require shrinking a live partition to repeat what I did before. Not sure I really want to go playing with that. Seems there's a problem with the update in demanding space it then doesn't use.

Pending update fix from MS.

Many problems have arisen for me https://answers.microsoft.com/en-us/windows/forum/all/serial-and-continuous-problems-after-kb5034441/2e53ea4f-f0e9-4a3e-ada2-e23d34789534