MBR2GPT conversion error "please remove the write protection"

so I'm doing the GPT conversion on a laptop booted into windows.
I run /convert /allowfullos
it creates the new partition but from there i get the message saying the disk cannot be written to because it is write protected. Please remove the write protection from the volume in the drive \device\harddiskVolume6
this appears to be the new partition that is created during the conversion.

i've tried using disk part to remove the write protection in the partition but this fails, i doubt the main HD is write protected as then i wouldnt be able to write anything to the C drive.

not sure what else to do here, if i continue the conversion fails and revers back (removes partition)
any ideas?

thank you in advance

Have you tried it from PE?

There is another thread dedicated to mbr2gpt,
Convert Windows 10 from Legacy BIOS to UEFI without Data Loss - Windows 10 Installation Upgrade Tutorials

I would try an offline conversion.

SIW2 said:

Have you tried it from PE?

Honestly i havent as I was trying to avoid that route (scrambling to find a usb stick), but looks like I may have to