I have been having this problem since the day I got my xbox360. Everytime I turn on the xbox console, in order to get it to stream music from my computer, I have to restart the "windows media player network sharing" service. I have even created a "batch" file to make this easier, but I know there's got to be a fix for this. I have tried everything I can think of, with no luck. As soon as I turn the xbox off, and then on again, back to the computer I go to restart this service. I've tried setting static IP's on both, made sure the ports were open which I guess it would not work at all if they were'nt. Any suggestions? I do not know if it is something on my computer or the xbox itself causing this, but I'd assume it is the computer.