Convert MBR Disk to GPT Disk in Windows 10

Matthew Wai · 11 Feb 2020

In 2017, I converted my HDD from MBR into GPT without data loss via GParted, a totally free partition editor.

Brink · 11 Feb 2020

Matthew Wai said:

In 2017, I converted my HDD from MBR into GPT without data loss via GParted, a totally free partition editor.

Thank you. I'll have to give it a play with.

Brink · 11 Feb 2020

zbook said:

Right click or press and hold on the disk # (ex: Disk 3) box of the MBR disk you want to convert to GPT, and click/tap on Convert to MBR Disk. (see screenshot below)

The text displayed Convert to MBR disk
The image displayed Convert to GPT disk

Typo?
Consider changing the text in option 3, step #3: Convert to GPT disk

Thank you. Now corrected.

Matthew Wai · 11 Feb 2020

Brink said:

Thank you. I'll have to give it a play with.

Sorry, I forgot to mention that it does not work on Windows 10 although I had successfully clean-installed Windows 10 after using it: How to convert MBR partition table to GPT without data loss
It can't possibly forbid a user to install Windows although it is not intended for Windows.

Brink · 11 Feb 2020

Matthew Wai said:

Sorry, I forgot to mention that it does not work on Windows 10 although I had successfully clean-installed Windows 10 after using it: How to convert MBR partition table to GPT without data loss
It can't possibly forbid a user to install Windows although it is not intended for Windows.

Oh well.

Anibor · 11 Feb 2020

GParted is a partition manager based on Linux. It´s used from a boot UFD. I don´t know if it can do this conversion, but it can do other partition work.

Matthew Wai · 11 Feb 2020

Anibor said:

I don´t know if it can do this conversion

I successfully used it to do this conversion and then successfully clean-installed Windows 10.

dalchina · 12 Jul 2021

Hi Shawn, could the tutorial referring to the free version of Minitool PW be corrected as the free version generally available doesn't support this, as noted in comments above and in this thread:
MBR2GPT Error - Frustrated

There there is a link to an older free version that does.

However that thread indicates that Easeus PM seems more informative.

I gave wrong advice based on this tutorial. Thanks.

Brink · 12 Jul 2021

dalchina said:

Hi Shawn, could the tutorial referring to the free version of Minitool PW be corrected as the free version generally available doesn't support this, as noted in comments above and in this thread:
MBR2GPT Error - Frustrated

There there is a link to an older free version that does.

However that thread indicates that Easeus PM seems more informative.

I gave wrong advice based on this tutorial. Thanks.

Thank you. I've updated the link in option 1 for the older version.

zbook · 12 Oct 2021

Hi Shawn,

The MBR to GPT conversion method for Minitool Partition Wizard requires similar prerequisites as in this tutorial:
Convert Windows 10 from Legacy BIOS to UEFI without Data Loss

Code:

Although disks configured with MBR-style partition can have up to four primary partitions, 
for this process to work the disk you want to convert can't have more than three partitions, 
because one allocation is needed to create the new UEFI system partition.

This was a recent thread in which Mini Tool was not able to be used until the extra partition was deleted:
One last attempt to change LEGACY to EUFI | Windows 11 Forum

Please consider updating this tutorial by adding the prerequisites or commenting on the prerequisites in the How to Convert Windows 10 from Legacy BIOS to UEFI without Data Loss tutorial.