Windows Management Framework 4.0 is now downloadable from Microsoft.
Windows Management Framework 4.0 includes updates to Windows PowerShell, Windows PowerShell ISE, Windows PowerShell Web Services (Management OData IIS Extension), Windows Remote Management (WinRM), Windows Management Instrumentation (WMI), the Server Manager WMI provider, and a new feature for 4.0, Windows PowerShell Desired State Configuration (DSC).
Link : Windows Management Framework 4.0 on Download Center