This download comes as a pre-configured VHD that enables you evaluate Microsoft Windows Server 2008 R2. The Microsoft VHD Test Drive Program provides customers a flexible, extensible and supported evaluation experience requiring minimal hardware and IT overhead. You can access the catalog of pre-configured Microsoft solutions in VHD format for test, evaluation, demonstration, training & education and proof of concept from www.microsoft.com/vhd. This’s a preconfigured virtual machine set contained within Virtual Hard Disk (VHD) format. Windows Server 2008 Hyper-V, Microsoft Hyper-V Server 2008, or R2 versions of these products’s required to use this virtual machine.