NetFx3 error while installing SQL Server 2012 on windows 2012 server

Problem description

TITLE: Microsoft SQL Server 2012 Service Pack 1 Setup

The following error has occurred:

Error while enabling Windows feature : NetFx3, Error Code : -2146498298 , Please try enabling Windows feature : NetFx3 from Windows management tools and then run setup again. For more information on how to enable Windows features , see http://go.microsoft.com/fwlink/?linkid=227143

For help, click: http://go.microsoft.com/fwlink?LinkID=20476&ProdName=Microsoft%20SQL%20Server&EvtSrc=setup.rll&EvtID=50000&ProdVer=11.0.3000.0&EvtType=0x681D636F%25401428%25401

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Solution 

Goto server manager

 --> Click on manager right side corner of window

--> Click Add Roles and Features

Blow Add Roles and features wizard window appears 

click on next

in the next screen click on Role-based or feature-based installation

and click on the next

in the Server Selection Screen select the first radio button i.e. Select a Server from the Server Pool 

In the server pool window you can see the server name 

On Server Roles page simply click on next

in Features page wizard clicked on the check box next to ".NET Framework 3.5 Features", and then clicked on the Next as shown in below image

and in final wizard click on install to add features

and installation progress as below 

Thanks & Regards
Venkat Sangu