Windows 10: I' trying to convert to GPT/UEFI to upgrade to Windows 11

Hello, I' trying to convert to GPT/UEFI to upgrade to Windows 11, as explained in this link :https://learn.microsoft.com/en-us/windows/deployment/mbr-to-gpthowever I get the following error message : Disk layout validation failed for disk 2could you help me ?Thank you very muchbest regardsMilo

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Convert Windows 10 MBR to GPT (UEFI)?

In reviewing my Windows 10 Pro (64-bit) system I noted that the Secure Boot Status is showing as "unsupported". Investigating further, it appears either the GPT partition for booting using UEFI (is Secure Boot) has become corrupt or my installation was
never installed for Secure Boot. My Windows 10 install is an auto-upgrade from a Windows 8.1 install.

Is there a way to convert the MBR to GPT without doing a fresh install? I do have a USB recovery drive built at a point I believe I had indications Windows was booting from a GPT (UEFI) partition. In fact, the USB recovery drive shows as being a UEFI drive.

Any suggestions will be appreciated!

Thanks!

 

Cannot convert GPT to MBR.

Hi Michael,



I suggest you to follow the below steps and check if it helps.

This method you have to backup all your data and delete all partitions and volumes. Then use the
DISKPART command.

• Open command prompt and type in DISKPART and press Enter
• Then type in list disk (Note down the number of disk you want to convert to GPT)
• Then type in select disk number of disk
• Finally type in convert gpt.

Hope the information helps. Do reply if you need further assistance.

 

GPT to MBR Failure

Windows 10 was not mentioned.

Had you upgraded from Windows 8.1 directly to Windows 11?

Please explain how you did that.

(It is not supposed to be possible to upgrade from 8.1 to 11)

Windows 11 upgrades require BIOS UEFI and drive partition GPT.

How come you want to convert GPT to MBR?

How come you want to convert UEFI to Legacy?