By Lucas / Last Updated March 9, 2022

The Question

I have an old Dell hard drive as my external drive. I can delete other two partitions except for the OEM partition, about 63MB. When I right click in Disk Management, I only got the help option instead of delete option, how could I delete the Dell OEM Partition correctly?

About Dell OEM Partition

Generally speaking, Dell OEM partition is a hidden partition in front of the hard drive and made by computer manufacturer like Dell. It’s created automatically while Windows is installing and used to reset your PC or restore to factory settings when emergency. In addition, Lenovo and HP also have the OEM partition. It can be small around 100M or less, or could be larger than 10GB.

If you don’t want to restore your PC to factory settings, or if you have created a recovery drive, you can delete Dell OEM Partition to free up space to extend system drive.

Can I Delete Dell OEM Partition Safely?

How to remove Dell OEM partition from hard drive safely while you can’t delete OEM partition for your Dell computer in Disk Management? You have two options to solve this problem. Diskpart command and the disk partitioning software are both works.

Diskpart delete Dell OEM partition

Diskpart is a hard drive and partitions management tool, which allows you to delete OEM Partition easily. Below is the tutorial.

1. Hit “Windows” + “R” combination key to open the dialog box, type “diskpart” and press enter.

2. Then type the following commands in turn.

  • list disk
  • select disk n, where n is the volume number of your disk that you want to operate.
  • list partition
  • select partition m, m is the volume number of the Dell OEM partition you want to delete.
  • delete partition override

Then you have deleted it with a success.

Delete with AOMEI Partition Assistant Professional

AOMEI Partition Assistant Professional is a powerful disk partitioning software, which allows you to create, delete, format partition, and restore deleted partitions in Windows 7, 8, 10. Thus, taking advantage of this software to delete Dell OEM partition in Windows 7/8/10 is a piece of cake.

First, you could download AOMEI Partition Assistant Professional to have a try. We are going to show you how to delete.

1. Install and run AOMEI Partition Assistant Professional, on the main console, right click the Dell OEM partition and choose “Delete Partition” at the drop down menu.

Delete EFI System Partition

2. Select a method to delete the OEM partition. “Delete partition quickly (Recomanded)” or “Delete partition and prevent data recovery, it will take more time”. Then hit “OK”.

Delet EFI Quickly

3. Click “Apply” to confirm this deletion if you have checked.

Apply Delete EFI

After a few seconds, you will find the Dell OEM partition has been removed successfully.

Restore If Accidentally Deleted Dell OEM Partition

However, if you want to keep Dell OEM Partition to restore your system to factory settings, and you accidentally deleted Dell OEM partition, what should you do? There is a life-saver solution provided by AOMEI Partition Assistant Professional.

Following text is about how to restore deleted Dell OEM partition in Windows 7, 8, 10.

1. Run the procedure, on the main interface, choose “Partition Recovery Wizard” on the left panel, and select a disk which you want to recover list in the pop-up window.

Partition Recovery Wizard

2. Choose a search method and hit “Next”.

Search Method

3. The program will list all the lost partitions, tick the lost partition and click “Proceed”.

Select Lost Partition

After a while, you will see that partition again and restore system to factory settings if needed. Furthermore, if you are not willing to keep all the partitions on the hard drive, you can delete all partitions with AOMEI Partition Assistant Professional. This software allows you to allocate free space to expend system drive or other partitions.