Microsoft's Hyper-V is a native (bare-metal) [hypervisor][2] available on Windows Server 2008 and later, and select editions of Windows 8 and later. (From [Wikipedia][1])
From [Hyper-V overview][3]:
The Hyper-V technology virtualizes hardware to provide an environment in which you can run multiple operating systems at the same time on one physical computer. Hyper-V enables you to create and manage virtual machines and their resources. Each virtual machine is an isolated, virtualized computer system that can run its own operating system. The operating system that runs within a virtual machine is called a guest operating system.
Microsoft provides Hyper-V through various channels: