What Is Hyper-V? Microsoft's Virtualisation Platform Explained

Hyper-V is Microsoft's built-in virtualisation platform: it lets one physical computer run several virtual machines, each with its own operating system, side by side. It's included as a role in Windows Server and as an optional feature in Windows 11 Pro, Enterprise and Education, with no separate download. Businesses use it to consolidate servers; developers and IT staff use it to test software safely.

What Is Hyper-V Used For?

Hyper-V is used to run several isolated computers on one physical machine, which saves hardware, power and maintenance. Microsoft lists these as the main use cases across industries:

• Server consolidation. Run a file server, a database server and a domain controller as separate virtual machines on one host instead of three physical boxes.
• Development and testing. Spin up a clean Windows or Linux machine, test an update or an app, then delete or roll it back.
• Disaster recovery. Hyper-V Replica copies virtual machines to a second site, so a business can bring services back quickly after an outage.
• Virtual desktops (VDI). Host desktop sessions centrally rather than on each user's PC.
• Running older or different systems. Keep a legacy application on its own virtual machine without dedicating hardware to it.

A virtual machine (VM) is a software-defined computer with its own virtual processor, memory, disk and network card. To the operating system inside it, it looks like a real PC.

How Does Hyper-V Work?

Hyper-V is a type-1 hypervisor, meaning it runs directly on the hardware rather than as an app on top of Windows. When you enable it, the hypervisor loads first, and your Windows installation becomes the parent partition that manages the hardware and creates the virtual machines, which run in their own child partitions.

That design has two practical effects. First, virtual machines run at close to native speed, because they don't pass through a second operating system layer. Second, each VM is isolated: a crash or infection inside one VM doesn't spread to the host or other VMs. The same isolation powers Windows security features such as Memory Integrity and Credential Guard, which is why enabling or disabling Hyper-V can affect them.

Which Windows Editions Include Hyper-V?

Hyper-V is included in Windows 11 Pro, Enterprise and Education and in every edition of Windows Server 2025; it can't be installed on Windows 11 Home.

Hyper-V on Windows 11 is a lightweight version aimed at development and testing. Hyper-V on Windows Server adds enterprise features such as failover clustering, live migration and replication between sites. If you're on Home and need VMs, our guide on how to upgrade Windows 11 Home to Pro shows how to switch edition without reinstalling.

What Do You Need to Run Hyper-V?

You need a supported Windows edition, a 64-bit processor with hardware virtualisation and SLAT, and enough memory for the host and every VM you run at the same time. Microsoft's requirements are:

• A 64-bit processor with Second Level Address Translation (SLAT), which lets the CPU translate VM memory efficiently.
• Hardware virtualisation (Intel VT or AMD-V) switched on in the BIOS or UEFI.
• Hardware Data Execution Prevention enabled (the XD bit on Intel, NX bit on AMD).
• At least 4 GB of RAM, though more is better because each VM takes its share.

To check, open Command Prompt and run systeminfo. If every line in the Hyper-V Requirements section says Yes, your PC is ready. If it reports that a hypervisor has been detected, Hyper-V or a related feature is already running.

How Do You Turn Hyper-V On in Windows 11 Pro?

Turn Hyper-V on from Windows Features, or with one PowerShell command, then restart.

1. Click Start, type Turn Windows features on or off, and open it.
2. Tick Hyper-V, which includes Hyper-V Platform and Hyper-V Management Tools.
3. Select OK and restart when prompted.
4. Open Hyper-V Manager from the Start menu to create your first virtual machine.

Alternatively, run Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V -All in PowerShell as administrator. A Windows 11 Pro product key unlocks Hyper-V on the host, but each Windows virtual machine you create needs its own valid licence too.

How Do You Disable Hyper-V?

To disable Hyper-V, clear it in Windows Features or run a PowerShell command, then restart. People usually do this because other virtualisation apps run poorly while the Hyper-V hypervisor is active.

1. Open Turn Windows features on or off.
2. Clear Hyper-V. If other virtualisation apps still have problems, also clear Virtual Machine Platform and Windows Hypervisor Platform.
3. Select OK and restart.

The PowerShell equivalent, run as administrator, is Disable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V-All. Microsoft notes that Memory Integrity and Credential Guard also use the hypervisor, so if systeminfo still says a hypervisor is detected after removing Hyper-V, one of those features is the likely reason. Weigh that carefully: those features protect you against credential theft and malicious drivers.

Can You Convert VMware Virtual Machines to Hyper-V?

Yes. Microsoft offers a free VM Conversion extension for Windows Admin Center that migrates virtual machines from VMware vCenter (versions 6.x to 8.x) to Hyper-V hosts. At the time of writing it's a preview extension, so test it before relying on it for production servers.

It copies disks while the source VM keeps running, then shuts the VM down for a short final sync. Linux VMs need Hyper-V drivers installed before migration, or they may not boot afterwards. For businesses leaving VMware for cost reasons, a Windows Server host plus this tool is a common path.

A Common Mistake We See

A frequent mix-up is assuming that because Hyper-V is "free", the virtual machines are too. Hyper-V itself costs nothing extra on Windows 11 Pro or Windows Server, but every Windows installation inside a VM still needs its own licence, unless the host licence specifically covers it, as Windows Server Datacenter does for Windows Server guests. Plan your VM licences at the same time as the host, and count the Windows guests you'll actually run before choosing between Windows Server Standard and Datacenter.

Frequently Asked Questions

Is Hyper-V free?

Hyper-V has no separate price. It's included with Windows 11 Pro, Enterprise and Education and with Windows Server. You pay for the Windows licence on the host and for any Windows licences the virtual machines need. Microsoft's free standalone Hyper-V Server ended with the 2019 version.

Can I use Hyper-V on Windows 11 Home?

No. Microsoft states that Hyper-V can't be installed on Windows 11 Home. To use it, upgrade to Windows 11 Pro, which keeps your files and apps. Alternatively, a third-party virtualisation app that doesn't rely on Hyper-V can run on Home.

Does Hyper-V slow down my PC?

Hyper-V itself adds very little overhead when no virtual machines are running. Running VMs uses real CPU and memory, so performance depends on how many you run and how much RAM you give them. Some other virtualisation apps may run slower or fail while Hyper-V is active.

How do I turn Hyper-V off temporarily?

The cleanest way is to clear Hyper-V in Turn Windows features on or off and restart. Some administrators instead run bcdedit /set hypervisorlaunchtype off and restart, which stops the hypervisor loading without removing the feature. Setting it back to auto re-enables it.

Which operating systems can run in Hyper-V?

Microsoft supports many versions of Windows, Windows Server, Linux and FreeBSD as Hyper-V guests. Very old systems may install but aren't supported and may lack drivers, so check Microsoft's supported guest list before relying on one for real work.

Conclusion

Hyper-V is Microsoft's built-in way to run several virtual machines on one PC or server, included with Windows 11 Pro and every edition of Windows Server. For testing on a desktop, Windows 11 Pro is enough. For hosting business workloads, a licence such as Windows Server 2025 Standard adds clustering, replication and guest licensing rights. Browse our Windows Server collection to compare editions.

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