Error Asp.net 4.0 has not been Registered on the Web Server. You Need to Manually Configure your Web Server

Introduction:

Here I will explain how to solve problem of “asp.net 4.0 has not been registered on the web server you need to manually configure your web server for asp.net 4.0 in order for your site run correctly”. Actually this problem occurred while creating application in visual studio 2015 because we installed iis 8.0 after .NET framework installed. To fix this problem we need to enable asp.net 3.5 or 4.5 version frameworks using Turn windows features on or off in control panel.

Description:

In previous posts I explained class asp responsive buffer limit exceeded error, convert string to lower case, upper case and title case in asp.net, jQuery send receive json object from webservice methods, Asp.net mvc complete project with database, download multiple files as zip folder in asp.net and many articles relating to solve errors in asp.net, SQL Server, IIS, etc. Now I will explain how to solve the problem of “asp.net 4.0 has not been registered on the web server you need to manually configure your web server for asp.net 4.0 in order for your site run correctly”.

In my system when I installed iis 8.5 and started using previous applications which is pointing to other versions 3.5 it’s not working and throwing error like as shown below

To fix this problem please follow below steps

Start à Control Panel à Click on Programs à Programs and Features à Click on Turn windows features on or off

                                        

When we click on Turn windows features on or off it will open window like as shown below

Now check whether asp.net installed or not in your system for that follow below steps

Internet Information Services à World Wide Web services à Application Development Features in that check whether all required features selected or not like as shown below

Once you select all options click on button to install all required components in your application.

Now run your application and check I hope it fix your problem in case if it failed please run following command in command prompt

Start à Open command prompt (cmd) à Right click on command prompt and run as administrator à once command prompt open run following command

C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe –i

I hope it helps you to fix your problem. Happy Coding……

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