By Teresa / Last Updated April 6, 2021

What is OEM Partition?

The Original Equipment Manufacturer (OEM) partition is a volume that contains system recovery programs, factory restore data, and diagnostic tools (in Dell PC), etc. It is used when you restore or reinstall Windows with the OEM disk or from BIOS. 

Different manufacturers specify different activate keys. For example, you can access HP OEM partition with F9 while you need to press F12 at power-up to enter Dell OEM. When your system corrupts or gets slower, you can easily go back to the factory installation with this partition. 

In most cases, the OEM partition occupies less than 100MB of the hard drive. Some computer manufacturer like HP displays this OEM partition with drive letter yet some hide this partition and it cannot be viewed in Windows Explorer. When it comes to OEM product key in a large amount of computers, sysprep is necessary. Also, one can delete an OEM partition if he finds it is useless.

Why Clone Windows 7 OEM?

There are many situations that one needs to clone OEM partition. In general, following are the two main reasons.

  • Clone OEM in Windows 7 to other places such as flash drive or external hard drive to gain more disk space. Despite of that the OEM partition takes little disk space, for PC user who has small disk capacity, this part counts. After cloning the OEM partition to other devices, one can delete the OEM partition and add the unallocated space to C drive, for example.

  • Clone Windows 7 OEM to SSD in disk upgrading. The OEM partition will be cloned if one performs Disk Clone, for example, clone Dell hard drive to SSD. However, for user who clone only system drive to SSD or do clean install on the SSD, the OEM partition does not been included under normal circumstances. If the SSD just has enough disk space, it is a wise move to keep OEM installed.

No matter which situation results in the OEM partition clone, what counts next is to find out how to OEM recovery partition.

How to Clone Windows 7 OEM?

Can you clone Windows 7 OEM like you clone other partitions? Absolutely, the answer is yes. Nevertheless, you have to turn to third party software in cloning related stuff since Windows does not support clone. AOMEI Backupper Professional is such a cloning tool that will help you clone OEM from HDD to SSD in Windows 10, 8, 7, XP, and Vista. No need to perform a full disk clone, the “Partition Clone” feature takes care of that. 

With this function, you can make an intact duplication of the OEM partition when you clone Dell OEM partition or clone Lenovo OEM partition. It has a user-friendly graphic interface for both computer novices and experts. In addition, the AMBackup.exe supports clone OEM partition in Command Prompt on the condition that the OEM partition has a drive letter.

Steps to Clone OEM in Windows 7 to SSD

Note: The destination SSD will be overwritten, please backup important files beforehand.

1. Connect the SSD to your PC via external disk bay or USB-to-SATA cable. Click the download button below to install and launch AOMEI Backuper Professional.

Download Free Trial Win 10/8.1/8/7/XP
Secure Download

2. Go Clone > Partition Clone.

Partition Clone

3. Select the OEM partition in Source Partition window.

Select OEM partition

4. Select the SSD as the target location.

Select New SSD

5. Click Start Clone.

Clone OEM Partition to SSD


* You can change the OEM location, adjust its partition size and give it drive letter with “Edit Partition” option. 

Edit Partitions of SSD


*This method also applies to clone Windows 8 or Windows 10 OEM partition to SSD.

*In most cases, the OEM active key is tied with computer motherboard.

You need only 5 steps to clone Windows 7 OEM partition to another place with the help of AOMEI Backupper. By default, this software will clone a partition/hard drive in Intelligent Clone mode which clone used part only. This mode makes clone larger hard drive to smaller one possible. What’s more, you can clone recovery partition to USB drive as well. Somehow, it is an IDE to IDE hard drive duplicator, too.