Things You'll Need
Instructions
Plug one end of the Ethernet cable into the Ethernet port on the back of the Xbox 360 and the other end of the cable into the laptop's Ethernet port.
Click on the "Start Menu," and select "Control Panel" then "Network Connections" on the laptop.
Select both the laptop's Internet connection, whatever it may be called, and the "Local Area Connection" by dragging a selection box around the two options or by clicking on each connection while continuously holding down the "CTRL" button on your keyboard.
Right-click either connection, once they are highlighted, and select "Bridge Connections." Wait while the bridging process is completed, which could take a few moments.
Turn on your Xbox 360 and navigate to "My Xbox," "Settings" then "Network Settings," using the "A" button on the controller.
Choose "Test Xbox Live Connection," and the Xbox 360 will complete the process of connecting to the Xbox Live service. This process can also take a few minutes, so be patient.