First of all what you need to do is open up your network connections. Then you need to highlight your wireless connection and your local area connection. After doing this you need to bridge both of the connections by right clicking on either connection and choosing the option of bridging them. Then all you have to do is connect the Ethernet cord to your Xbox and to your laptop and you should be connected once your turn your Xbox back on. By following the steps shown in this video you'll be able to connect your Xbox to XBox Live using your laptop!