Microsoft Windows Server 2008 Hyper-V R2 (Hyper-V), the next-generation hypervisor-based server virtualization technology, is available as an integral feature of Windows Server 2008 R2 and enables you to implement server virtualization with ease.
Hyper-V allows us to make the best use of the server hardware investments by consolidating multiple server roles as separate virtual machines (VMs) running on a single physical machine.
Hyper-V requires 64-bit machines with AMD-V or Intel VT-enabled processors
Hyper-V is not available for the Itanium edition or Windows Server 2008 R1 32-bit editions.
Hyper-V is available as two different versions: