Connecting a laptop to broadband Internet requires an account with an Internet service provider, either a broadband modem and a router or a combined modem/router box, and a laptop. Once the modem and router are set up, plug an Ethernet cable from the router into the LAN port on the laptop.
For combined modem/router setups, plug the modem into any available electrical outlet. Using a phone cord, plug the WAN port into an available wall jack. Do not use a DSL filter on the phone line. Plug an Ethernet cable into the LAN port of the box, then plug the other end into the LAN port on the laptop. Boot up the computer, enter the Start menu and select Control Panel. Navigate to the Network and Sharing Center, click "Set up a new connection or network," and then select "Connect to the Internet." The automatic wizard takes will guide the rest of the process, according to Windows.
If there are two separate devices, a modem and a router that are not combined, plug the modem into any available electrical outlet. Use a phone cord to connect the WAN port on the modem to any available wall jack. Use an Ethernet cable to connect the modem to the WAN port on the router, then connect the router to any available electrical outlet. Finally, use another Ethernet cable to connect the LAN port on the router to the LAN port on the laptop. Once the cables have been connected, the same steps for creating a network through the Start Menu can be followed to completion.