Windows update (KB5034441) Error (0x80070643)

I noticed the same thing. It is a mystery what the MS folks are doing with this Partition since it is essentially empty on Win 10 MBR, Win 10 GPT and Win 11 GPT PCs. Perhaps they are storing some kind of instructions or smaller files there. I set all my PC's (MBR and GPT) up to 1024MB for the Recovery Partitions. I did notice the improper setting of the ID=27 on the MBR drives when I followed the MS Instructions. Some of the online videos did correct this error "those titled Creating a Recovery Partition in Windows 10. It is pretty easy to run the Set id=27 from Diskpart if needed.

The strange thing is my older PC completed this troubled update without a Recovery Partition identified? I can't explain that. The creating of a larger Primary Partition (not identified as Recovery) seemed to make it happy. It is best to have your Recovery Partition not displayed in File Manager, away from folks who might try something strange.

Moral of the story, be sure you have a Windows Recovery (full files and programs) on a separate Disk or Thumb. A newer Thumb Drive of 1-2TB with good Recovery Software will do this job easily and can be kept off-site, just in case.

I see it is now entirely empty and so while I might have a recovery partition, there seems to be nothing there to recover from and this is an elderly machine. God knows where any media would be. Maybe the next thing to look at is how to create something in the recovery partition!

I have already tried to explain this. Windows RE has been enabled in C:\Recovery\WindowsRE and could easily be updated there, so KB5034441 could install.

Move Windows RE from there to the recovery partition by running

reagentc /disable

reagentc /enable

Answering my only question ... partially ...

I had a look in diskpart and indeed the created recovery partition was type 07, no longer 27. Using set id=27 the partition is now listed as a recovery partition:

v previously

I see it is now entirely empty and so while I might have a recovery partition, there seems to be nothing there to recover from and this is an elderly machine. God knows where any media would be. Maybe the next thing to look at is how to create something in the recovery partition!

This does not actually create a recovery partition. The second line reverts the id set in line one.

You may have noticed the partition is no longer tagged recovery. Your Windows RE has been enabled on drive C due to the former recovery partition not recognized. You may run

set id=27

in diskpart right now and disable/enable the recovery environment one more time. This time the recovery partition will be recognized.

I'm not sure I understand.

The first line creates the partition and sets the type of the logical drive created as 0x27, meaning a Win RE partition. The second line then formats that logical drive and gives it a label, but that's not going to alter the drive type. The format is in effect a higher level command carried out within the bounds set by the lower level partitioning of the disk.

I don't understand why you say the second line "reverts the id set in the first". The format can only operate on the partitioned area of the disk, while the creating of the partition and setting the partition id are part of the entire physical disk MBR

? ? ? ? Sorry, you lost me way back LOL

Thanx anyhow