If the device isn't seen at all, try a different USB port or a different computer to rule out a hardware defect.
Plug the dongle into a USB 2.0 port (sometimes 3.0 ports cause interference). launchstudio.bluetooth.com/listingdetails/75270 driver
If you're experiencing issues with the device, here are some general troubleshooting steps: If the device isn't seen at all, try