I am currently in possesion of 2 xbox 360s. Xbox live works for one and not the other. My internet's fine and xbox live is up and running to.. I've done troubleshooting (reset network hardware,factory default reset network settings) and nothings worked. If it works for one xbox obviously it's not a network problem,but I believe both my xboxs have the same network settings (automatic). So what's different about that one xbox? For the one that doesn't work it doesn't have the new update,but i can't get the new update until I can sign into live. I see no reason why it should not be working if it works for the other xbox. There just must something wrong, a setting or something, with that one xbox. HELP PLEASE THANK YOU!!!