Take a look at the Uniden cable on ScannerMaster's page.
Uniden USB Cable
(Uniden's page
here)
See that cylindrical bulge in the cable in the middle? Does your cable have that? If it does not, or only has a small 'bump' (like an RF choke), then you did not get the correct cable to use for pc programming. The scanner itself is not a valid USB device as far as the computer is concerned. That's what the 'bulge' in the cable is, a small chip set. The chips themselves, after the correct drivers are installed, show up in the pc as a virtual serial port, which is then used for pc/scanner communication, whether for programming, firmware upgrades, or virtual controls.
If it's still within 30 days, ask for your money back, especially since the product was misrepresented. Without actually seeing the full cable you got, instead of just the two connector ends on the eBay page linked, I suspect that the cable you bought was simply that: a cable. Nothing more; none of the required circuitry needed to be recognized by the pc, which is why loading the drivers made zero difference.A plain cable, whit it appears you got, needs no drivers, The correct cable does need drivers.
You can obtain the correct cable, Uniden's USB-1, from ScanerMaster, Uniden, or other sources. However, if you have the serial programming cable that came with the scanner, see
Connecting scanners via USB - The RadioReference Wiki. There are a number of USB->Serial adapters available to let you use the original cable.