HTTP Error 500.21 - Internal Server Error Handler "PageHandlerFactory-Integrated" has a bad module "ManagedPipelineHandler" in its module list

Introduction: In this post I will explain how we can sort out the “HTTP Error 500.21 - Internal Server Error Handler "PageHandlerFactory-Integrated" has a bad module "ManagedPipelineHandler" in its module list” error when we run the website on IIS.

Description:
In the last article I have explained Auto refresh data in Gridview without loading page whole page in asp.net, How to use SiteMapPath Navigation Control in Asp.net, Encrypt and Decrypt Query String in asp.net, Create multiple Language website in Asp.net and Store Password in Encrypted format to Database in asp.net.

To sort out this error Go to Start menu >> All programs >> Accessories >> Right click on Command Prompt >> Run as Administration and type below given command:

          %windir%\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe –i

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