I am having a Windows Vista Ultimate system. I had properly connected Xbox 360 to the same. There is a Xbox extender also attached to the media center. When I start Windows Media Center, it works for few seconds and then freezes. My mouse keyboard does not work. I cannot select any item nor I can end it. And after a few minutes there is a error that Connection terminated. The xbox is disconnected. It ask to reconnect it back. Without adding the extender Xbox works. But the problem only appears when there is a extender attached to the same.