Have you ever tried a different connection method? Maybe the laptop is not getting the best signal. (If you have money to spend) try buying a wireless adapter for you xbox and connect wireless that way. What I have the option to do is, I can use the Ethernet cord that runs straight from my home computer, through the attic and to my Xbox. Or I can just plug a short ethernet cord to my room computer and get internet from there. Your probably just encountering connection problems with your laptop or with you service provider. If you are having trouble with connection on your main computer, you might want to call them to see what the problem is. If you can't do any of this, the only thing I can suggest is to try and find another T.V. in your house and move closer to your router (that way you will have a better connection).