Jon
Try this, the only reason I'm suggesting, is I had to do a Windows 8 refresh last night, and my box wouldn't re-connect to the laptop.
Fire up the software as normal with your box connected.
From the "settings" menu, go into "control panel" and select "Hardware and Sound" and then "view devices and printers".
Your Radarbox should show up under "unspecified".
Check to see if it has a warning symbol next to it.
If it hasn't, then I'm afraid I can't help, but if it has a yellow triangle, click on it, and select the "hardware" tab to see if the box is recognised via a USB port. If it isn't, you don't have the drivers installed properly.
It should tell you that you don't have the drivers installed, in this box.
You should then be able to follow the instructions it tells you , by clicking on "get drivers", provided you are able to locate them wherever they are on your pc. I normally drop them into the drivers folder in the ANRB folder, and then go and locate them accordingly form here when prompted by the wizard.
Even with the box still plugged in, mine then automatically kicked into life this morning.
Good luck, let us know how you get on?
I still think it's shocking that customers should be expected to fathom all this out themselves.............
Regards
Rich