Vagrant comes with support out of the box for Hyper-V, a native hypervisor written by Microsoft. Hyper-V is available by default for almost all Windows 8.1 installs.
The Hyper-V provider is compatible with Windows 8.1 only. Prior versions of Hyper-V do not include the necessary APIs for Vagrant to work.
Hyper-V must be enabled prior to using the provider. Most Windows installations will not have Hyper-V enabled by default. To enable Hyper-V, go to "Programs and Features" and check the box next to "Hyper-V."