Instructions
Plug one end of the Ethernet cable into the Ethernet port on your Xbox. Plug the other end into the Ethernet port on your laptop.
Turn on your laptop and log in to Windows. Click on the "Start" menu and open the "Control Panel." Open the "Network and Sharing Center." Click on "Manage network connections."
Turn on your Xbox. You will see the Xbox&'s connection appear as an icon in the "Manage network connections" window. While pressing the "ctrl" key, click on your computer&'s Local Area Connection and the Xbox&'s connection. Then right click on one of the icons and select "Bridge network connections..." The screen will refresh and your Xbox will now be connected to your laptop.