 <p>You probably want to install .NET Framework 4.5, which is an in-place, backwards-compatible version of the .NET 4.0 framework. You can find the installer here: <a href="http://www.microsoft.com/en-us/download/details.aspx?id=30653" rel="nofollow">http://www.microsoft.com/en-us/download/details.aspx?id=30653</a></p>