This is the second in a series of videos I will be creating discussing basic virtualization. When you are done watching this video, you should be able to create a Windows Server 2008 R2 SP1 virtual guest.
MS Windows Server 2008 R2 SP1: http://msdn.microsoft.com/en-us/evalcenter/ee175713.aspx
Virtualbox: https://www.virtualbox.org/wiki/Downloads