By Dervish / Last Updated April 26, 2022

Overview of Windows 11

Microsoft has officially released Windows 11 on October 5, 2021 and stated that this is the most important update of the Windows operating system. In addition to bringing a new UI design, Windows 11 also provides many innovative features that support the current mixed working environment, focusing on improving user productivity in a new and flexible experience.

But the biggest difference between Windows 11 and the previous Windows OS is that Windows 11 pays more attention to user data security, so the hardware requirements for installing Windows 11 will be higher. According to the officially announced hardware requirements, Windows 11 only supports booting from UEFI, which means that your system disk must be a GPT disk. So if you plan to upgrade from Windows 10 to Windows 11, you must ensure that your Windows system is located on the GPT disk. If not, please convert MBR to GPT. This article aims to guide you on how to convert MBR to GPT for Windows 11.

What you should know before Windows convert MBR to GPT for Windows 11?

Before converting MBR to GPT, you should figure out what is GPT and UEFI, and what is the relationship between them.


Boot mode is actually the program that guides the computer to start. To put it simply, it is a program that is first started after the computer is turned on to prepare for the start of the operating system. After the operating system is booted, we can see the Windows desktop. Generally, there are two boot modes: Legacy BIOS and UEFI. BIOS is an earlier boot mode, while UEFI is a new generation of bios. In contrast, UEFI has faster boot speed, higher security, and supports larger capacity hard drives. And it is displayed in a graphical interface, allowing users to operate more intuitively.

Bios Vs Uefi


MBR and GPT are disk partition styles used to store data on HDD and SSD. MBR (Master Boot Record) is an old partition style that requires a traditional BIOS to boot, and supports hard drives up to 2 TB and 4 partitions in the drive. GPT (GUID Partition Table) is a new partition style that requires UEFI mode to boot. Not only does it have no size limit, but it also has unlimited partitions on a single drive.

In most cases, we use MBR + BIOS, but this is no longer applicable to Windows 11. If you want to upgrade directly from Windows 10 to Windows 11, you need to convert the system disk from MBR to GPT, and then change the BIOS to UEFI boot mode.

How to MBR to GPT for Windows 11 update without losing data?

You may know that Windows built-in programs Command Prompt and Disk Management can convert disks to GPT, but they can only convert MBR disks to GPT disks by deleting all the partitions on the target disk. You will lose all your data! And they cannot convert the system disk into a GPT disk, because Command Prompt and Disk Management do not allow deleting the system partition.

So, how to convert MBR to GPT in Windows 11, 10, 8, 7 without data loss? I highly recommend you to use AOMEI Partition Assistant Professional, this is one of the most popular disk management tools in the market. It aims to solve various problems for users in a simple way. Its built-in function Convert to GPT disk can help you to convert disk between MBR and GPT both system disk and data disk, the converted disk can use normally without losing any data. Whether you are using Windows 10/8.1/8/7/Vista or Windows XP, it is compatible.

Next, I will show you how to convert MBR to GPT for Windows 11 update with AOMEI Partition Assistant Professional.

Download Demo Win 11/10/8.1/8/7/XP
Secure Download

Tip: Before convert MBR to GPT in Windows, please make sure your motherboard supports UEFI boot mode. Otherwise, the computer will not boot normally. If your motherboard does not support UEFI, you can create a Windows 11 bootable USB to enjoy Windows 11 operating system.

Step 1. Install and run AOMEI Partition Assistant Professional. Right-click the disk (take the system disk as an example) and choose “Convert to GPT Disk”.

Convet mbr to gpt

Step 2. Click “OK” to confirm your operation.

Step 3. Click “Apply” to commit the pending operation.

During the process, you have successfully converted MBR to GPT. Then, you can go into the BIOS and switch from Legacy to UEFI mode. You can use the same method to convert GPT to MBR without data loss.

How to change Legacy BIOS to UEFI?

After successfully converting MBR to GPT for Windows 11, you need to change BIOS to UEFI.

Step 1. After the computer is turned on, quickly press the shortcut key prompted at the bottom of the computer screen to enter the BIOS.

Step 2. Navigate to the Boot tab, where you can switch from Legacy to UEFI.

Step 3. Now, save the settings and exit according to the prompted keys.

Upgrade to Windows 11 from Windows 10

Finally, you just need to go to “Settings”> “Update and Security”> “Windows Update”, and then click “Check for Updates”. If available, you will see Windows 11 feature updates. Click Download and Install to complete.


From what has been discussed above, this is the whole process of convert MBR to GPT for Windows 11 update. With the help of AOMEI Partition Assistant Professional, converting MBR to GPT is no longer a problem. In addition, it can do many things. Including Migrate OS to SSD, Disk Clone, Convert primary partition to logical drive, and vice versa. By the way, if you want to do these in Windows Server, please use AOMEI Partition Assistant Server.