My parents purchased a new tower and gave me their old one. My desk is one foot to the right of my mom's desk. We have a wireless router but all the home pc's are connected by ethernet cords. When we switched out the towers the one they gave me now states network cable unplugged, even though it is connected with the same cord. I have tried changing cords and switching which port used on the router and rebooting the modem and router and pc in order and have also uninstalled the driver and rebooted. Nothing is working. Any suggestions would be greatly appreciated. Internet works for all other computers including my laptop and smartphone.