Windows 10: What is the purpose of so-called Recovery Partitions?

I'm a little confused about the purpose and/or need for so-called Recovery Partitions which is something that first came about with Windows 10. I recently came to notice that some of my Windows 10 computers have them whereas others do not. Might this mean that Recovery Partitions are an option that can be chosen when setting up a Windows 10 or 11 I presume computer? It might be worth pointing out that I'm in the habit of setting up my own computers. The primary motive is to operate them in multi-boot mode, which is my preferred method of providing recovery capability. For example, I hav

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Failure to apply update due to recovery partition issue?

My suggestion would be to:

1) Disable WinRE

2) Delete partitions 4 and 5.

3) Extend the C drive to utilize the unallocated space (minus 750 MB)

4) Create a Recovery partition in that 750 MB unallocated space.

Step 1:

*******

To disable WinRE, run:

• reagentc /disable
  

Next, check if winre.wim has been moved to the c:\windows\system32\Recovery folder. To do so, run:

• dir c:\windows\system32\Recovery /a
  

Please post the outputs.

 

Manually resize partition for KB5034441 not increasing recovery partition

After encountering the KB5034441 update error I decided to use the following support article to increase the size of my windows recovery partition:

KB5028997: Instructions to manually resize your partition to install the WinRE update

I have followed the steps as described however my Recovery partition does not get any larger.

I have:

• disabled WinRE (not seen in the screenshot)
  
• Shrunk the C drive partition (not seen in the screenshot but you can see the 250MB free space on the disk) in the first list disk call
  
• deleted the previous Recovery partiton with 506MB
  
• Created a new Recovery partition with attributes and formatted it
  

But having completed all the steps my Recovery partition is still 506MB and the free space hasn't been reallocated so the update continues to fail.

See my screenshot:





I saw in a (timestamp 4:11) that if the C drive partition is not next to the Recovery partition then there are extra things that need to be done but I do not understand them.

Can someone help guide me through?

PS I don't actually know what the purpose of partition 3 is. In disk management it is called EFI System Partition so I assume it is necessary and I have worked around it.

 

How To: Create recovery partition.

it worked when i copied all the files of the disk to the recovery partition i created, but i had to use WinPE tab to add the entry.

Type: WIM Image (Ramdisk)
Name: Recovery
Path: Z:\Sources\boot.wim
and hit Add Entry
I tried it in VirtualBox and it worked.
At first, it would add a second "Windows 7" entry to the list, but when the installation is finished, the old one is deleted. (I formatted only C: partition)