How do you install Windows PowerShell 4.0 on Windows 7?

Windows PowerShell 3.0 is installed on Windows 7 by default but not Windows PowerShell 4.0.
You can check for version and verify if you have Windows PowerShell 4.0 as detailed in the following post:
http://hodentekhelp.blogspot.com/2014/08/if-you-have-multiple-versions-of-power.html

Review this image:

So, how do you install Windows PowerShell 4.0 on Windows 7?

First of all lets take a look at what are the new features that we can use in Windows PowerShell 4.0
Here are the Windows PowerShell 4.0 new features:

 •Support for workflow and remote script debugging
•Improved workflow authoring experience to make it more consistent with script authoring
•Added PipelineVariable as a common parameter
•Better support for downloading updatable help by using Save-Help and Update-Help in offline scenarios
•Updated version from 3.0 to 4.0
•Several bug fixes and performance improvements

Read more here:
http://www.microsoft.com/en-us/download/details.aspx?id=40855

In order to get Windows PowerShell 4.0 you need to install Windows Management Framework 4.0. This can be installed on Windows 7 SP1.
 I am not focussing on Windows Servers for this post.
It is not available for Windows 8.0 but installs by default when you upgrade to Windows 8.1

 

You can download WMF 4.0 from the previous link.
The download  has multiple files as shown here:

WMF40files.png

Installing WMF 40 confers the following functionality:
•Windows PowerShell 4.0
•Windows PowerShell ISE
•Windows PowerShell Web Services (Management OData IIS Extension)
•Windows Remote Management (WinRM)
•Windows Management Instrumentation (WMI)
•The Server Manager WMI provider
•A new feature for 4.0, Windows PowerShell Desired State Configuration (DSC)

You have a much more power full interface now.