Just to confirm, I've tested the device in XP on a VMware machine and it works fine so definitely a compatibility issue.
I've removed and deleted all of the Zadig WinUSB drivers and it's now back as being an external storage device. However, when going to install the NETMD760 device drivers it's now saying that it's not compatible.
I'll try installing with unsigned drivers allowed.
EDIT:
Idiot, been trying to install the NetMD driver over the wrong device. Bear with, I'll try it again.