Microsoft .NET Framework (current version at time of this publish is 4.5.1) is a technology for Windows OS by Microsoft which supports building and running of different kind of apps on computers and other supported devices. The framework perfectly stores and executes the programing codes and scripts obtained from the web locally. It prevents the version conflicting between different software installed on the system.
Installing .NET Framework 4.5.1: If you are running Windows 8 or 7, the latest version of .NET Framework might be installed there already. But if it isn’t, then download the offline installer of .NET Framework at the download link below and install the framework on your system. On Windows 8, 7 and Vista, run the setup as “Administrator”.
If you are running Windows 8.1, then the package is already included with the OS and you don’t need to install it manually. Still if you believe that .NET Framework is missing from your computer, then download it below and install it on your system.
To determine which version of .NET Framework is installed on your system currently, visit Microsoft’s official help on this topic at http://msdn.microsoft.com/en-us/library/hh925568.aspx.
If you are on a faster internet connection, then you might prefer to install .NET Framework using the online installer. You can download web installer for .NET Framework 4.5.1 here.
The standalone installer contains all necessary installation files but it lacks the language packs. For enabling multilingual support, you need to download the language packs separately. Below link will download the Microsoft .NET Framework 4.5.1 offline installer for you.