I have been using WHS to store videos and movies for few years. I have a PC with a lot of horse power with and tuners that I use to sream videso and music to 2 Xbox360 in my house. This setup worked perfectly for 2 years until I upgraded my Pc to Win 7 ultimate. I prefer to use Win Media Center and since the upgrade Xbox can take few minutes to start playing videos located on the server. Once the playback starts, it continues without a problem. Everything is on a gigabit network and I do not expirience this issue when streaming to my PCs from the server, or from PC to Xbox. Any idea on what may be causing the delay in playaback? The screen simply says buffering for few minutes, no error messages on server or or xbox.