Open Command Prompt as an Administrator

Press Win + X and choose “Command Prompt (Admin)” from the menu.

Alternatively, search for “cmd” in the Start menu, right-click on “Command Prompt,” and select “Run as administrator.”

Check WinRE Status

Run the following command to check if Windows Recovery Environment (WinRE) is installed:

reagentc /info

Look for the path to the WinRE directory. If it’s already installed, you’ll see the path.

Disable WinRE

If WinRE is enabled, disable it using the following command:

reagentc /disable

Shrink the OS Partition (Usually C: Drive):

list disk
select disk X  # Replace X with the disk number of your OS drive (usually 0)
list partition

Example 1 - Windows RE partition as First Partition

DISKPART> list partition

  Partition ###  Type              Size     Offset
  -------------  ----------------  -------  -------
  Partition 1    Recovery           450 MB  1024 KB  <<< Windows RE Partition
  Partition 2    System              99 MB   451 MB
  Partition 3    Reserved            16 MB   550 MB
  Partition 4    Primary            199 GB   566 MB  <<< Windows OS Partition

Example 2 - Windows RE partition as Last Partition

DISKPART> list partition

  Partition ###  Type              Size     Offset
  -------------  ----------------  -------  -------
  Partition 1    System             103 MB  1024 KB
  Partition 2    Reserved            16 MB   104 MB
  Partition 3    Primary            237 GB   120 MB  <<< Windows OS Partition
  Partition 4    Recovery           684 MB   237 GB  <<< Windows RE Partition

Shrink the Windows OS Partition

You need to shrink the Windows OS Partition to make room for a larger WinRE partition.

If the Windows RE partition is the first partition, you need to shrink the OS partition the total amount required for the Windows RE partition (recommended 810 MB)

If the Windows RE partition is the last partition, you only need to shrink the OS partition by the amount you want to increase the WinRE partition (recommended 360 MB)

Type the following commands one by one:

select partition Y  # Replace Y with the partition number of your Windows OS partition
shrink desired=360  # Shrink the partition by 360 MB (adjust as needed)

Delete the Existing WinRE Partition

Still in diskpart, select the WinRE partition (usually a small one) and delete it:

select partition Z  # Replace Z with the WinRE partition number
delete partition override

Create a New Recovery Partition

Still in diskpart, check the partition table format:

The disk partition style will be either GUID Partition Table (GPT) or a Master Boot Record (MBR). To check run list disk. If there is an asterisk character (*) in the "GPT" column, then the drive is GPT. Otherwise, the drive is MBR.

GPT

If your disk is GPT, run:

create partition primary id=de94bba4-06d1-4d40-a16a-bfd50179d6ac
gpt attributes =0x8000000000000001
format quick fs=ntfs label="Windows RE tools"

MBR

If your disk is MBR, run:

create partition primary id=27
format quick fs=ntfs label="Windows RE tools"
set id=27

Re-enable WinRE

Exit out of diskpart by running the command exit.

Run the following command to re-enable WinRE:

reagentc /enable

Confirm WinRE Installation

Verify that WinRE is installed by running:

reagentc /info

You should see the updated path to the WinRE directory.

References:

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