By Dervish / Last Updated September 26, 2021

Why convert GPT to MBR?

GPT (GUID Partition Table) and MBR (Master Boot Record) are two types of partition tables that are used for describing the partition on a disk. GPT is newer than MBR, and it has more advantages than MBR in many aspects, so lots of people are willing to change the MBR partition table to GPT. And Microsoft declared that Windows 11 only can boot from UEFI mode, users would have to use GPT disk.

From the form table down below, you can see the comparison between MBR and GPT.

Comparison Mbr And Gpt

However, MBR is not out of data today. There are some factors to determine that you need to convert a GPT disk to MBR. As can be seen from the table, MBR is more compatible, which supports BIOS and old systems while GPT supports UEFI and new systems. So there are some users still planning to convert GPT to MBR. But how to convert GPT disk to MBR?

How to convert GPT to MBR with Hirens Boot CD?

When it comes to convert GPT to MBR, you may want to use the Hirens Boot CD. It puts lots of the diagnostic, recovery, repair utilities on a convenient CD. You probably know you need to create a bootable CD to use these functions. But you may feel confused because its operational procedure is somewhat complex. Here we will tell the details about how to convert GPT to MBR with Hirens Boot CD.

Part 1. Create Hiren’s Boot CD

First of all, you need to prepare a blank CD/DVD and download Hirens Boot CD zip file from official website, then burn the image to the CD/DVD.

Step 1. Download Hirens Boot CD and insert a blank CD/DVD or flash drive to your computer, and extract the zip file. Double-click to open BurnCDCC.exe.

Step 2. In the pop-up window, choose CD/DVD as the Device. Check the Read Verify, Finalize, Auto Eject. Then click “Start” to burn the files.

Burn Cdcc

When it is completed, you would have a Hirens bootable CD. Then go for part 2 to learn how to start converting GPT to MBR using the Hirens boot CD.

Part 2. Convert GPT to MBR with Hirens Boot CD

Now follow these steps to convert GPT to MBR.

Step 1. Reboot your computer from the Hiren Boot CD, then you will see lots of utilities on the window. Select “Dos Programs” > “Partition Tools

Step 2. Now, you will see what the Hiren Boot CD contains, you can choose a partition tool to perform the GPT to MBR conversion, here we choose “Gparted Partition Editor” as an example. Then press “Start” to open it.

Partition Tool

Step 3. After a few minutes, you will enter to Gparted desktop, then open Partition Editor, then click “Device menu” > “New partition table” > “MBR” > “Apply”.


Warning: this operation will erase all data on the entire disk. If there are some important data on it, please backup the disk beforehand.

Now, just wait for the operation to finish. And you can insert the Hirens bootable CD to any other computers for converting GPT disk to MBR, even including the computer that cannot boot into OS successfully.

Hirens Boot CD alternative to convert GPT to MBR without CD and data loss

As shown above, you can use Hirens Boot CD to convert GPT to MBR, but is it a little bit trouble some to create a bootable CD/USB, and reboot the computer? Can it be easier with a good converter?

Yes, it can be. A GPT to MBR converter is highly recommended here-AOMEI Partition Assistant Professional. With AOMEI Partition Assistant, you don’t need to create a bootable CD, and you can convert data or system disk between GPT to MBR without data loss.

You can click the follow button to download demo version and see the specific steps to convert GPT to MBR with the Hirens Boot CD alternative.

Download Demo Win 10/8.1/8/7/XP
Secure Download


Step 1. Install and open AOMEI Partition Assistant Professional. In the main interface, right-click the disk you want to convert, and select “Convert to MBR Disk”.

Convert System Disk To Mbr

Step 2. Then click “OK” to confirm the operation to convert GPT to MBR.

Ok To Mbr System Disk

Step 3. Click “Apply” to start the conversion.

Apply To Mbr System Disk

After a while, your disk will be converted from GPT to MBR without data loss or deleting partitions. Besides, if your computer can’t boot successfully for some reasons, you could also create a bootable CD with it like Hirens Boot CD, then convert GPT to MBR.

Make Bootable Media


You can use Hirens Boot CD to convert GPT to MBR disk. But obviously, with AOMEI Partition Assistant, conversion becomes much easier, you don’t need to prepare a blank CD or USB and to reboot computer.

Besides, AOMEI Partition Assistant Professional also contains lots of features to assist you managing disk and partition like converting dynamic disk to basic, migrating OS from MBR disk to GPT or from GPT disk to MBR, SSD secure erase.