Thoughts about setup and deployment issues, WiX, XNA, the .NET Framework and Visual Studio
All postings are provided AS IS
with no warranties, and confer no rights. Additionally, views expressed
herein are my own and not those of my employer, Microsoft.
I have posted a few items in the past related to the Xbox 360 PC setup package that can be used to configure an Xbox 360 as a Windows Media Center extender. In order to make it easier to find all of the suggestions I have posted, I created an article with links to each of them. You can take a look at the Troubleshooting guide for Xbox 360 PC setup issues to see the previous posts I have written on this topic.
One important thing to note that is listed at the bottom of that article is that the Media Center Extender team at Microsoft asked me to let everyone know that they monitor the newsgroup named Microsoft.Public.Windows.MediaCenter to search for Xbox 360 PC setup issues. If you run into issues installing or configuring an Xbox 360 as a Windows Media Center extender, please search that newsgroup for similar issues, and if none are found, please post a new thread there so that the team will be more likely to see the issues and respond to them in a timely manner.
Yardman, I had the exact problem that you described. I upgraded my ethernet card drivers and now I can stream live tv and recorded tv from my media center PC to my xbox 360. I have an HP Pavilion with a RealTek ethernet card, oddly the latest driver was NOT on the realtek site, but I found it on an HP driver update site. good luck.