Windows comes pre-configured for Internet access via Ethernet. If your computer includes an Ethernet adapter as many do, connecting your computer to the Internet is as simple as connecting a cable.

If a computer is unable to configure a valid Internet Protocol address, it can't connect to a network. If you plug a laptop directly into a modem with an Ethernet cable and receive a "No Valid IP ...

Connect the modem to a wall outlet with a coax cable and plug the modem into an electrical outlet. Connect devices to the ...