If the modem or the laptop is not wireless, you need a cable. Connect the laptop to the cable at the laptop's Ethernet port, and connect the other end to one of the router's Ethernet ports. On power up the router should see the laptop. Done.

In other words, the laptop will connect exactly like the desktop.

Cable to cable modem's cable port, modem to router's WAN port, each PC to router's LAN ports.

Wayne

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