The components required to enumerate Web references are not installed on this computer. Please re-install Visual Studio
问题：
Today when I tried to add Web Service to My WPF application I was getting following error:
"The components required to enumerate Web references are not installed on this computer. Please re-install Visual Studio"
解决方案：
Run
"C:\Program Files\Microsoft Visual Studio 9.0\Common7\IDE\Devenv /ResetSkipPkgs" , it worked for me
备注：VS2008是安装在C盘的，如果你安装在其他位置，注意切换。此问题发生在vsual studio 2008
