I am seeing reports that Windows 7 Service Pack 1 is causing problems for people using Windows Media Center Extenders. There is a thread on TGB with numuors users complaining about an error “files needed to display video are not installed…” when playing back TV content on an Xbox 360. It looks like uninstalling the service pack does not fix the problem, so I would hold off install SP1 for now until we have more information. Service Pack 1 for Windows 7 doesn’t have any new features for Media Center users but I do remember seeing at least one Media Center fix included in the update.
The Media Center PC I have that connected to my Extender doesn’t have SP1 on it at the moment and works fine, so I am going to take one for the team and install SP1 on it and see if I can reproduce the problem and maybe work out a solution.
UPDATE: I have just installed on my Media Center machine and Recorded TV playback still works on my Xbox 360 Extender, my machine is 64bit with HD Homerun
If you have you SP1 installed please let me know if recorded TV playback is working and whether you have the 32 or 64bit Windows and which tuner you are using.