Unplug the dongle and then plug it back in. If you have multiple USB ports, plug into a different USB port on the same computer. If your USB plug or wireless USB dongle is plugged into a USB hub:
Plug the hub into a different USB port on the same computer.
Make sure you’re using a powered hub that works for high-powered USB devices.
Try to plug the wireless plug or dongle into a USB port on your computer instead of the hub.
See if your mouse or keyboard works with another PC. If it does, there might be a problem with your PC.