NTFS Vdisk won't mount with qemu-nbd, "unclean file system"

[VanGoghComplex]

I have a Windows 10 vdisk that I would like to move some files to directly from another disk on my server within Midnight Commander, as moving the files inside the VM takes an unacceptable amount of time.

I'm attempting to follow SpaceInvaderOne's tutorial here: 

Everything goes well until I actually mount the drive. I get the following error:
 

Metadata kept in Windows cache, refused to mount.
Falling back to read-only mount because the NTFS partition is in an
unsafe state. Please resume and shutdown Windows fully (no hibernation
or fast restarting.)

 

SI1 got the same error on his first attempt, and he says "let me just go cleanly shut down that VM and try this again."

As far as I am aware though, I am cleanly shutting down my VM - I'm logging into it via RDP and shutting it down from the Start Menu.

Is there something here I'm missing on "cleanly" shutting down a Windows 10 VM?

[JorgeB]

Disable Windows fast start, then shutdown, or shutdown while pressing the shift key.

[VanGoghComplex]

That did the trick, thank you!