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Modern versions of Hyper-V also features the ability to natively boot some OSes from virtual hard disks, giving the user the benefits of dual booting different OSes without having to manage separate boot launchers or hard drive partitions. running an isolated environment (sandbox), running older software, or a different OS without dual booting the host machine. Hardware virtualization also has plenty of other use cases such as for e.g. However since modern CPUs still support 16-bit execution through the virtual 8086 mode when running in legacy mode, hardware virtualization allows 16-bit execution through a suitable guest VM with a 16-bit or 32-bit operating system installed. One example is 16-bit program compatibility as support for these is not included in 64-bit variants of Windows.

Ī common use case for hardware virtualization is to circumvented compatibility issues with older software by running the software inside a suitable VM. As of 2022 most of the prominent hypervisors requires hardware-assisted virtualization and will not work without it. While older hypervisors allowed hardware virtualization even without these features enabled, they were often recommended or required for virtual machines to achieve their most optimal performance. Modern computers have additional hardware capabilities to assist in virtualization called Intel VT-x and AMD-V, commonly just referred to as hardware-assisted virtualization. The underlying machine used for the virtualization is referred to as the host, and the software that creates these virtual machines is called the hypervisor or virtual machine monitor ( VMM), while the virtual machines themselves are often referred to as guests. As few elements as possible are emulated, therefore most of the expected CPU performance can be obtained with a variable overhead depending on the system. Virtualization is commonly used to refers to hardware virtualization, the act of creating and running an operating system within a virtual machine ( VM) alongside code belong to other virtual machine(s) running on the same architecture and hardware (without converting no emulation). Snapshot or save state features allow saving a virtual machines current state, which can be useful for troubleshooting or testing.