Convert MBR (BIOS) disk to GPT (UEFI)

In Windows To Go open cmd with administrator privileges.

mbr2gpt.exe /disk:1 /convert /allowfullOS

Or boot into Recovery cmd and check the disk number you want to convert:

diskpart
list disk

mbr2gpt.exe /disk:0 /convert

Cannot find OS partition(s) for disk 1
Find unknown entries:

bcdedit /store E:\boot\bcd /enum all

Delete unknown entries:

bcdedit /store E:\boot\bcd /delete {identifier_string}

[BCD Deployent]
Partition: E:\
Install BCD
Yes
Write MBR

[BCD Backup/Repair]
Reset BCD configuration
Perform Action

[Add New Entry]
Drive: E:\
+

reboot
mbr2gpt.exe /disk:1 /convert /allowfullOS

Cannot perform layout conversion error 0x00000000:

mbr2gpt.exe /disk:0 /convert /map:222=af9b60a0-1431-4f62-bc68-3311714a69ad /allowFullOS

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