No drivers required, it's a plug-and-play device.
Open your Device Manager, view by Connection and follow the chain to see if there are any devices which you can't identify. Open the properties and check the Hardware ID on the Details tab; the VID should be 2B73, and the PID should be 0022.
If you happen to find the right one, right-click and uninstall it back in the Device Manager window. Disconnect, reboot, open the device manager again and then connect it to see if it works.
Without rekordbox running, the LED on the top should blink.