Microsoft .net framework is used to create application that is needed by some application to run properly .
Step 1. Download .net framework from Microsoft site and install it.
Click on setup and accept the terms and conditions
Step 2 . click on install I have already install net framework 4
Step 3. After installing net framework 4 you will get this windows
Step 4 it will ask you for restart the system
Click on restart you’re done