There are two different partitions that we are talking about here, and I think they are getting confused. Seeing a screenshot of disk management would help:
https://www.tenforums.com/tutorials/...creenshot.html
There is a System
Reserved partition. On UEFI computers this is called the EFI System partition. This is the partition the computer boots from. In disk management, look inside the parenthesis (). One partition should have the word System inside the parenthesis. This is the partition that the computer boots from and must be present. Now on legacy BIOS computers the system partition the computer boots from can be part of the big partition that has the OS on it, it can part of the recovery partition, or it can be it's own partition. On a UEFI computer, this partition is always the EFI System partition and must be FAT32.
The other partition we are talking about is the System
Recovery partition. In Windows 10, the recovery partition is completely option and is not required for Windows 10 to work. You can delete the recovery partition. All the standard recovery partition created by Windows 10 does is provide the recovery menu. You can also get to the recovery menu by booting from a Windows 10 installation USB flash drive or DVD. There are 2 reasons why you would not want to delete the recovery partition:
1. If it is a holdover from an upgrade from Windows 7 or Windows 8 and the manufacturer put their factory restore image in the recovery partition. This does not apply to pure Windows 10 computers because if there is manufacturer specific info for factory recovery that is now included as a provisioning package contained in the partition that contains the OS itself. You can still delete a recovery partition from Windows 7 or 8 and it will not affect Windows 10 - it will only remove the potential to restore the computer back to the factory Windows 7 or 8 if desired.
2. The recovery partition and the system partition have been combined. If the recovery partition has the word "system" appearing inside the parenthesis in disk management then this is the partition the computer is booting from and cannot be deleted without first moving the boot files to another partition.
If neither one of those two reasons apply, then you can delete the recovery partition.