I have an HP ENVY DV6 Notebook (product # C6N89UA#ABA) and the touchpad is not working. I cannot even see a mouse cursor on the screen. When I got Settings/Devices I do not even see an option for touchpad. I tried hitting the button in the top left corner to no avail (I have never tried turning the touchpad on and off). I have no idea how to fix this issue. It was working earlier today and I did not knowingly touch or change anything. I have rebooted several times. Any help would be greatly appreciated!