Real quick and dirty, I wanted to note this Chart of Windows Powershell supported operating systems. If you run into some Server 2008 instances, you will want to enable Powershell in Programs | Add Features of your control panel.
Server 2008 R2 ships with Powershell, but Non-R2 versions look to need having it enabled for support. Be warned, some installers just presume powershell is installed, and will error out when that package is running. Happy Admining.