Default Another Heimdall LibUSB Error -12

Sorry to post this as I know most of you are probably fed up with seeing these errors but...

Brand new laptop (Windows 7 x64) so has never had kies installed.
No samsung drivers in Programs and Features
Trying to follow this guide -
Phone is currently stock 4.3 Samsung Galaxy I9300
Heimdall version checks out ok
Tried WinUSB, linusbK and libusb0 (all seperately) and each says installed successfully but each time i get the libusb error -12 in dos.
Tried different cables and ports in laptop.

Any other ideas?

EDIT - Anyone know anything else i can try?