Imagine my heartbreak, if you will, when I plugged the dongle in to find a nice big 'USB device not recognised' error. Upon opening Device Manager, the exact error description is 'Unknown USB Device (Device Descriptor Request Failed).

When I plugged the same dongle into my girlfriend's laptop, the device worked fine for about three minutes, before throwing the same error.
If anyone has an idea to solve this (I've tried removing the driver and restarting windows), it would be greatly appreciated, although I do suspect that the dongle is simply dead, I just don't want to fully admit that yet.