Check Windows Control Panel, System, Hardware, Device Manager and see if the device is present or yellow flagged as faulty. If it is flagged, uninstall it and Refresh. It may reinsatll correctly. The other thing that can happen is that the hardware has failed or that you have some driver issues. Go to the Emachine website and download the drivers for your laptop and reinstall those.Good Luck and let us know how it is going.