Microsoft published the WMF 5.1 for Windows 7 [Quick Guide]
Microsoft for announced on my blog that the Windows Management Framework (WMF) 5.1 is now available for download for Windows 7, as well as Windows 8.1.
Servers versions equivalent to Windows Server 2012 R2 and Windows Server 2008 R2, Windows Server 2012 also benefit from this update of the framework.
To see what’s new: WMF 5.1 Release Notes
Microsoft specifies that the installation procedure for Windows 7 and Windows Server 2008 R2 is now different, it is no longer necessary to install WMF 4.0 beforehand, you will find the installation instructions on this link: Installation WMF 5.1