HTTP Error 500.23 - Internal Server Error An ASP.NET setting has been detected that does not apply in Integrated managed pipeline mode.

HTTP Error 500.23 - Internal Server Error
An ASP.NET setting has been detected that does not apply in Integrated managed pipeline mode.

You gets this error mostly in windows 7 when you wants to run you web site using virtual directory on IIS.

This solution is :Open IIS manager, and go to the Application Pool for your site.
Change the properties of the application pool from "Integrated" to "Classic".

Solution By: Rajesh Rolen