Convert Windows 10 from Legacy BIOS to UEFI without Data Loss  

steve108 said:

I would think you could resume trying mbr2gpt again since you have 3 partitions and unallocated space now.

Got the same error as before

Benned said:

Got the same error as before

How to Fix MBR2GPT Failed Errors Easily on Windows 10 look at this. I have used this tool, but not for mbr2gpt.

steve108 said:

How to Fix MBR2GPT Failed Errors Easily on Windows 10 look at this. I have used this tool, but not for mbr2gpt.

The only thing that page says is to try the Move/Resize feature, and i mean i moved the unallocated space to in front of the C: parition but that just made me go back to square 1 "Cannot find room for the EFI system partition". When i moved it back to behind the C: parition it got back to the second error i ran into. So again, sadly, I'm stuck (well next to the paid options ofc)

Benned said:

The only thing that page says is to try the Move/Resize feature, and i mean i moved the unallocated space to in front of the C: parition but that just made me go back to square 1 "Cannot find room for the EFI system partition". When i moved it back to behind the C: parition it got back to the second error i ran into. So again, sadly, I'm stuck (well next to the paid options ofc)

"6. An All-in-one Solution for MBR2GPT Failed Error"

You could try letting the tool do the conversion.

So that's one of the paid options i was talking about 😅

Benned said:

So that's one of the paid options i was talking about ��

Oh, I didn't realize that.

Yeah no worries, there's multiple tools out there for mbr to gpt but they all cost money even tho they advertise it as it being free

for mbr to gpt but they all cost money

Diskgenius free edition can do mbr>gpt conversion and create the esp and msr partitions. You can then use bcdboot to add the boot files to the esp partition.

Pretty sure I posted screenshots on here somewhere.

Expand the C: partition using unallocated space, then defragment the c: drive, then reduce the C: drive by 2 GB and try mbr2gpt again. Maybe there's too much disk fragmentation right now causing the failure - I'm speculating.

About how long does it take from time you start mbr2gpt until it ends/fails?

Left to right in this order:
Reserved by system
C: (inc startup)
Not in use
Recovery

"Not in use" = Unalllocated