Hi JeanLambert,
1. Have you made any recent changes on the computer?
2. When was the last time it was working fine?
Check if there is any problem with the internet connection in Windows media center.
Troubleshoot problems with an Internet connection in Windows Media Center
**http://windows.microsoft.com/en-US/windows-vista/Troubleshoot-problems-with-an-Internet-connection-in-Window-Media-Center**
Known issues and limitations for Netflix on Windows Media Center for Windows Vista
http://support.microsoft.com/kb/972496
The only changes is the Microsoft updates. I have three PC with vista, and the problem exist on all three of them. My wifes has 7.0 in hers it still works. But I have not updated it yet. I am about to reinstall Vista in my Laptop and set up in the orginal setting,
and see what happens. But I hoping some comes up with a fix before that. I have Norton 360 on this since I bought the Laptop 3 years ago, and it has been working fine, in fact it stop a bad trojan horse about 6 months ago. But then everything was still working.
I did a sc/scannow, and it told me that there is a corrupt registry file, but I don't know how to access the Log to see what it was.
I am hoping one you wiz kids has an answer. Note also there is and Office update 2007 that won't install. I tried about 10 times now, but it always fails. But I don't think this the issue with the Netflix and media center. Because it worked then.