From what I can make out either: 1) the drivers appear to be installing but Windows can't read them, or 2) he drivers aren't installing and the installation process is getting it wrong. Has anyone else had this same problem? Or can anyone tell me if there's a way manually search for the drivers or force Windows to recognise the drivers?
BTW, have reinstalled drivers multiple times with USB cable in/out/in a cup of tea, all drivers are latest from MOTU, and have tried disabling antivirus while installing (it's a bit of an XP era solution but worth a shot... not that it worked!). Have also logged this with MOTU support but been told to expect a reply within 1-2 working days so not 'til next week now

EDIT: Have found what appear to be the drivers in the correct place in the filesystem: C:\Windows\System32\DriverStore
There are two folders here: one starts motubus.inf and the other starts motuafw64.inf.
The motubus.inf folder contains:
motubus (Security Catalog)
Motubus (Setup Information)
motubus.PNF (Precompiled Setup Information)
motubus64.sys (SYS file)
The motubusfwa64.inf folder contains:
motufwa64 (Security Catalogue)
MOTUFWA64 (Setup Information)
motufwa64.PNF (Precompiled Setup Information)
MotuFWA64.sys (SYS File)