If you bought the 'UC100' from Amazon or Ebay, you should approach them for a refund. It would help if you would tell us where the 'UC100' came from and how much you paid for it. Then maybe members of the forum could advise you the likelihood of it being a fake.

I, personally, have no experience with these devices, but have a control box which uses two BoBs and is run from a XP PC with a PP card and onboard parallel port. As has been mentioned, getting the right drivers is a pain in the arse, and I had to resort to hardware identification codes to track down the software needed. If you don't speak fluent computer, then you have little to no chance - Sorry !

I seem to recall that, at the start of this thread, you had a working CNC system on XP - so why change. If it ain't broke don't fix it !

Then again, you were wanting to do something else (I recall GRBL being mentioned) - so treat it as a separate problem and ask for advice on the way forward with that.