Microsoft Hyper-V Virtualization Infrastructure Driver is a Windows driver that enables Hyper-V virtualization support on a host system, allowing virtual machines (VMs) to run on that system. This driver is part of the infrastructure that supports Hyper-V, Microsoft's hypervisor technology, enabling hardware virtualization and managing the interaction between the physical machine and virtual environments.

When you install Hyper-V on a Windows server or a client system (like Windows 10 Pro or Enterprise), Hyper-V virtualization infrastructure drivers are typically installed automatically. These drivers facilitate the communication between the virtualized environment and the underlying physical hardware.