cloudbase/windows-openstack-imaging-tools — pull request #10 by ader1990 (2013-12-28 21:57:32+00:00)
Title: Windows Server 2008 R2 inexistent Unblock-File bug

The latest version of PSWindowsUpdate uses the "Unblock-File" command, which requires Powershell>= 3.0.
Windows Server 2008 R2 default Powershell version is 2.0.