今天在开始处理我的应用程序之前,我更新了我的WinXP.安装所有更新后,我的WCF服务停止工作.当我尝试在浏览器中打开service.svc文件时出现以下错误：

Configuration Error

Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately. 

Parser Error Message: An error occurred creating the configuration section handler for system.serviceModel/bindings: Could not load type 'System.Security.Authentication.ExtendedProtection.Configuration.ExtendedProtectionPolicyElement' from assembly 'System,Version=2.0.0.0,Culture=neutral,PublicKeyToken=b77a5c561934e089'.

Source Error: 


Line 131:       </behaviors>
Line 132:
Line 133:       <bindings>
Line 134:           <wsHttpBinding>
Line 135:               <binding name="MyWSHttpBinding" maxReceivedMessageSize="2147483647">

我的同事在更新之前尝试运行相同的服务,它的工作正常.安装更新后,他也有同样的问题.有人可以帮帮我吗？