Windows 10: Cannot find room for the EFI system partition.

C:\WINDOWS\system32>MBR2GPT.EXE /convert /allowfullos MBR2GPT will now attempt to convert the default book disk. If conversion is successful the disk can only be booted in GPT mode. These changes cannot be undone! MBR2GPT: Attempting to convert disk 1 MBR2GPT: Retrieving layout of disk MBR2GPT: Validating layout, disk sector size is: 512 bytes MBR2GPT: Trying to shrink the OS partition Cannot find room for the EFI system partition. MBR2GPT: Conversion failedWhat should i do now? Im trying to download Win11 .***Moved from Windows / Windows 10 / Windowsin päivitys, palautus ja varmuuskopioi

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MBR2GPT fails with error - Cannot find room for the EFI system partition.

Regarding this image, which partition should I extend?

The problem wasn't that I didn't have enough space to update, it was the MBR2GPT error: "cannot find room for the EFI system partition"

 

How do find room for EFI system partition?

I've been trying to convert my Legacy bios to UEFI, to access secure boot and update to windows 11. I've been trying with to convert my disk using the mbr2gpt method, but I keep getting Can not find room for the EFI system partition. I've tried shrinking my C: and have 5gb of unallocated space, yet it is not working.

 

MBR2GPT fails with error - Cannot find room for the EFI system partition.

Have you tried running MBT2EFI while in Windows? Normally, the System EFI partition will be placed after the OS partition. If the utility cannot shrink the C partition, it may not be able to add that partition. You do only have 58 GB free in C so I can
see why it might have problems.

It also has to add an MSR partition which is probably 16 MB so there may not be enough room in the 101 MB partition, but just guessing.