WCF service errors after installing WindowsXP updates

Question

Greetings,

today before I start working on my application I updated my WinXP. After all updates have been installed my WCF service stop working. There is a followin

Answer 1

So far, the problem indeed seems to come from the update KB982168 and only on 2003 servers. Microsoft support suspects a bug in the HttpTransportSecurity constructor that tries to instantiate a ExtendedProtectionPolicy object, but this class does not exist in system.dll on a 2003 server (or XP machines) (you can check with reflector). And it is indeed present on the DLL on a 2008 or Vista and above. If the problem is confirmed, I think there will be a hot fix released very soon. Meanwhile it is recommended to not install the update. I'll keep you informed.