I have checked in both the Device Manager & Disk Management....no luck. Also tried your first option without success.
All other USB devices are recognised, so I really stuck at the moment.
I was thinking of getting a PCI sata card to get over the problem, but I would rather use the USB ports if possible.
I can not understand why they are recognised by sata and not usb.
If you have any other ideas great, otherwise thanks for your help.