"Cannot create EFI system partition. Error: 0x000036B7" when converting mbr2gpt

Question

Hello,

Currently trying to install Windows 11 from Windows 10 -->

Need to change boot mode from "Legacy + UEFI" to "UEFI" -->

Need to convert drivers from "MBR" to "GPT" -->

Conversion failed (as a result of no space I think) -->

Unallocated ~300MB on my disk that has System files -->

"Cannot create EFI system partition. Error: 0x000036B7" when running command "mbr2gpt /convert /allowFullOS"

I don't know how to fix this issue because many of the issues claim of deleting excess partitions, but I only have 1 partition.

Attached are some screenshots of the commands I ran.

Any help will be appreciated, and happy holidays!

Answer 1

Try the following: Extend drive C into the unallocated space.