Thanks Kyhi for the reply.

Yes I am running Windows 10 Pro - a fresh install using the "upgrade key"

Point 6 under Option 1 here:

DISM - Repair Windows 10 Image - Windows 10 Forums
...

I booted in to Windows PE and ran disk part to find out the drive letters and this has shown that the Windows drive is mounted under Windows PE as C: and the 15 GB as K:
I then ran:


dism...

Hello - I have just done a fresh install of Windows 10 Pro to my reasonably old hardware.

I am running a boot loader called Clover which emulates EFI and Windows 10 has therefore been installed...