How to Delete OEM Recovery Partition in Windows 11

OEM recovery partitions often remain locked on your drive, consuming valuable storage space that the standard Windows 11 Disk Management tool cannot modify or delete. This guide outlines how to safely bypass these system restrictions using Windows 11’s built-in Diskpart utility to remove stubborn OEM partitions and merge the unallocated space back into your primary drive.

Why Standard Tools Fail

Windows 11 flags OEM (Original Equipment Manufacturer) partitions as protected to prevent accidental deletion of factory restore files. Consequently, right-clicking these partitions in Disk Management results in a grayed-out “Delete Volume” option or an error stating the action is not supported. Using the command-line Diskpart tool with an override parameter is the standard method to remove them.

Important Considerations Before Deletion

• Data Safety: Deleting a partition is permanent. Ensure you do not delete your primary system partition (C:) or the EFI System Partition.
• Factory Reset Capability: Removing the OEM partition deletes the manufacturer-specific recovery image. You will still be able to reinstall Windows 11 using official media, but factory-bundled software will be lost.

Step-by-Step Guide: Deleting the Partition via Diskpart

1. Open Command Prompt as Administrator
   • Press Windows Key + S, type cmd, right-click Command Prompt, and select Run as administrator.
2. Launch the Diskpart Utility
   • Type diskpart and press Enter.
3. Identify the Disk
   • Type list disk and press Enter.
   • Note the disk number containing the OEM recovery partition (usually Disk 0).
4. Select the Disk
   • Type select disk X (replace X with your actual disk number) and press Enter.
5. Identify the Recovery Partition
   • Type list partition and press Enter.
   • Locate the partition labeled “Recovery” or identified as “OEM”. Note its partition number.
6. Select the Partition
   • Type select partition Y (replace Y with the specific partition number) and press Enter.
7. Force Delete the Partition

   • Type the following command and press Enter:

     delete partition override

   • The override parameter bypasses the protection flag and removes the partition immediately.

8. Exit Diskpart
   • Type exit and press Enter to close the utility.

Reclaiming the Unallocated Space

Once the partition is deleted, the space becomes “Unallocated.” You can allocate it using Disk Management:

1. Right-click the Start Menu and select Disk Management.
2. If the unallocated space is directly adjacent (to the right) of your C: drive, right-click C:, select Extend Volume, and follow the on-screen wizard.
3. If the space is not adjacent or you prefer a separate drive, right-click the unallocated space and choose New Simple Volume to assign it a new drive letter.