Plug it, then go to Device Manager, press Del (and check delete driver files from hdd or something like that), then unplug it.
Install official drivers from PSJailbreak (if there's something like that) then plug the dongle.
It should work that way.
If it doesn't, do the first thing deleting the drivers, unplug, reboot and plug in a different usb port.
USB ports are like PCI slots back in the day, a PITA.