If you get the error Unrecognized configuration section system.serviceModel then probably the configuration file of .Net Framework 2 “machine.config” is corrupt.
The Solution
Replace the “machine.config” file with one from another computer, or download the file I’ve attached. The “machine.config” file is located at “C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\CONFIG”.
That’s all!