Hello,this just happened to me earlier today I lose my internet connection I went to diagnose the problem aqnd it said "cannot communicate with www.microsoft.com" the only solution that came up was to reset my wireless adapter I did that and it still comes up with the same thing yesterday I bridged my Local Area Connection with my Wireless Network and I also had to turn off my internet sharing to do it and all worked fine yesterday and now it just stopped working any help
(btw I bridged the connections so I can play on Xbox Live with my new Xbox 360)