Cannot create EFI system partition. Error: 0x000036B7 when running mbr2gpt.exe

Anonymous

I've seen similar posts about this but was not enough for me to resolve my issue.

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Ramesh 183.6K Volunteer Moderator

The error code (0x80070057) during the format operation can be caused by a bad disk.

Anyway, let's try converting to GPT via WinRE.

Create a USB setup disk.

https://support.microsoft.com/en-us/windows/create-installation-media-for-windows-99a58364-8c02-206f-aa6f-40c3b507420d

Boot from the USB setup disk and access WinRE.

In WinRE Command Prompt, run MBR2GPT. https://answers.microsoft.com/en-us/windows/forum/all/convert-an-existing-windows-10-installation-from/aa8c2de3-460b-4a8c-b30b-641405f800d7

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14 additional answers

Anonymous

2025-06-20T02:57:05+00:00

Here's the cmd output
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Ramesh 183.6K Reputation points Volunteer Moderator

2025-06-20T02:48:21+00:00

It's UEFI boot.

But the command prompt output is cut off. Please share the entire output.
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Anonymous

2025-06-20T02:46:41+00:00

Ask you kindly requested.
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Ramesh 183.6K Reputation points Volunteer Moderator

2025-06-20T02:35:28+00:00
Step #3 can't be done unless Step #2 has been completed and the system rebooted.

However, after seeing your screenshots, I think the system has booted in UEFI mode already.
1. Launch msinfo32.exe, and click System Summary. Resize the columns in the right pane to make the entries visible, and post a screenshot of that screen.
2. From admin Command Prompt, run:
diskpart

list disk

select disk 0

detail disk

list part

exit

Post the output.
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