Hyper-V vs. VirtualBox on Windows 11: Why They Fight and How to Coexist

12 Aug 2026

Hyper-V and Oracle VirtualBox both allow you to run virtual machines on a Windows 11 computer.

You might use them to:

Test another operating system
Run older business software
Create isolated development environments
Analyse untrusted applications
Operate Linux tools
Test software updates
Build training or demonstration systems

The trouble often begins when you install or enable Hyper-V and discover that an existing VirtualBox machine has become extremely slow, refuses to start or reports that hardware virtualisation is unavailable.

You may also experience the reverse: VirtualBox works properly, but Windows Subsystem for Linux 2, Windows Sandbox or a Hyper-V machine no longer starts.

This is not normally caused by a damaged processor or incorrect BIOS setting. It happens because Hyper-V and VirtualBox want to use the same hardware-virtualisation capabilities—but they approach them in different ways.

Modern VirtualBox versions can operate on a computer where Microsoft’s hypervisor is active. However, this does not mean that both products receive equal, direct access to Intel VT-x or AMD-V. VirtualBox must instead work through Microsoft’s Windows Hypervisor Platform, which can introduce performance and compatibility limitations. (Microsoft Learn⁠)

Understanding that distinction is the key to making the two platforms coexist reliably.

What Is Hyper-V?

Hyper-V is Microsoft’s built-in hypervisor technology.

It runs beneath the normal Windows operating environment and controls access to the computer’s virtualisation hardware. Windows itself then operates within Hyper-V’s privileged root partition while virtual machines run in isolated child partitions.

Microsoft describes Hyper-V as a type-1 hypervisor that runs directly on the computer’s hardware. It is included with Windows 11 Pro, Enterprise and Education, but the full Hyper-V role is not available on Windows 11 Home. (Microsoft Learn⁠)

Hyper-V supports features such as:

Generation 2 virtual machines
Virtual switches
Checkpoints
PowerShell management
Secure Boot for supported guests
Virtual Trusted Platform Modules
Nested virtualisation
Windows and supported Linux guests

It also forms part of the broader virtualisation architecture used by several Windows security and development features.

What Is VirtualBox?

Oracle VirtualBox is a cross-platform virtualisation application that runs on Windows, Linux and other supported host systems.

Traditionally, VirtualBox accessed the processor’s hardware-virtualisation extensions directly. This gave it control over Intel VT-x or AMD-V while one of its virtual machines was running.

That arrangement works well when no other hypervisor has already claimed those extensions.

VirtualBox is often chosen for:

Existing .vbox virtual machines
Portable development labs
Virtual appliances distributed in OVA or OVF format
Cross-platform workflows
Older guest operating systems
Training environments
Users already familiar with its interface and networking model

The conflict arises when Hyper-V starts before VirtualBox and takes control of the same processor features.

Why Hyper-V and VirtualBox Fight

Modern processors provide hardware features that allow virtual machines to run efficiently.

Intel calls its primary technology VT-x, while AMD calls its equivalent AMD-V.

Microsoft explains that only one software component can directly control these hardware-virtualisation extensions at a time. When the Hyper-V hypervisor is running, a third-party virtualisation application cannot take direct ownership of them in its normal way. (Microsoft Learn⁠)

Hyper-V loads very early in the Windows startup process. By the time the desktop and VirtualBox application appear, Microsoft’s hypervisor may already be controlling the virtualisation hardware.

VirtualBox then has two possible outcomes:

It refuses to start the virtual machine or reports a virtualisation error.
It uses Microsoft’s Windows Hypervisor Platform as a compatibility layer.

Oracle’s current documentation says that VirtualBox can detect Hyper-V and use it as the host virtualisation engine. Oracle also warns that using VirtualBox and Hyper-V on the same host can result in poor or significantly degraded performance. (VirtualBox⁠)

This is what “coexistence” usually means:

VirtualBox is not operating beside Hyper-V as an equal hardware hypervisor. It is operating on top of Microsoft’s hypervisor interface.

The Windows Hypervisor Platform Compatibility Layer

Microsoft provides the Windows Hypervisor Platform, sometimes shortened to WHP or WHPX.

This exposes APIs that third-party applications can use to create and control virtual processors while the Microsoft hypervisor remains responsible for the underlying hardware.

Microsoft specifically identifies VirtualBox 6 and later as being compatible with Hyper-V through this architecture. (Microsoft Learn⁠)

This allows you to keep features such as:

Hyper-V
WSL2
Windows Sandbox
Memory Integrity
Credential Guard

while still running supported VirtualBox machines.

However, performance and feature behaviour may differ from native VirtualBox mode.

Possible symptoms include:

Slower virtual-machine startup
Reduced processor performance
Slower disk or network operations
Audio or video delays
Timing problems in older operating systems
Poorer performance under heavy workloads
Nested virtualisation limitations
Virtual machines that work inconsistently
VirtualBox displaying a green turtle icon

Oracle documents the green turtle icon as an indication that a native host hypervisor such as Hyper-V is active. (VirtualBox⁠)

For light testing, occasional application use or basic development, the performance may be acceptable. For processor-intensive workloads, large builds, databases or nested labs, the difference can be more noticeable.

Hyper-V May Be Running Even When You Never Enabled It

A common source of confusion is that the main Hyper-V checkbox may be clear in Windows Features while the Microsoft hypervisor is still active.

That is because several Windows components can depend on the same virtualisation architecture.

Memory Integrity

Memory Integrity—also known as Hypervisor-Protected Code Integrity or HVCI—is a Windows security feature that uses virtualisation-based security and the Windows hypervisor to protect kernel code-integrity checks from the normal operating system. (Microsoft Learn⁠)

You can check it under:

Windows Security > Device security > Core isolation details > Memory integrity

Disabling it may allow VirtualBox to return to native operation, but it also removes an important protection against malicious or untrusted kernel-level code.

Credential Guard

Credential Guard uses virtualisation-based security to isolate protected Windows credentials.

Microsoft says Credential Guard is enabled by default on eligible Windows 11 devices in several configurations, including qualifying domain-managed systems. (Microsoft Learn⁠)

On a company computer, Credential Guard may be controlled through Microsoft Intune or Group Policy. Employees should not disable it simply to improve local virtual-machine performance.

WSL2

WSL2 uses the Virtual Machine Platform, which Microsoft describes as a subset of the Hyper-V architecture.

The full Hyper-V role may not be installed, but WSL2 still requires the Windows virtualisation platform and can cause the hypervisor to start. This also applies to Windows 11 Home, where WSL2 is supported even though the full Hyper-V role is unavailable. (Microsoft Learn⁠)

Windows Sandbox

Windows Sandbox also relies on Microsoft virtualisation technology to create its temporary isolated desktop.

It is currently supported on Windows 11 Pro, Enterprise and Education rather than Home. (Microsoft Learn⁠)

Other Possible Dependencies

The Microsoft hypervisor may also be required by:

Hyper-V virtual machines
Hyper-V-isolated containers
Some Android emulators
Application Guard configurations
Security baselines using VBS
Endpoint-security products
Corporate application-control policies

This is why removing only the main Hyper-V checkbox does not always make VirtualBox use native VT-x or AMD-V.

How to Check Whether the Microsoft Hypervisor Is Running

Press Windows key + R, enter:

msinfo32

and select OK.

In the System Summary, look for:

A hypervisor has been detected. Features required for Hyper-V will not be displayed.

Microsoft identifies this message as confirmation that the Hyper-V hypervisor is currently running. (Microsoft Learn⁠)

You can also open Command Prompt and run:

systeminfo

Near the bottom of the output, look for the same hypervisor message.

Do not confuse this with the Virtualisation: Enabled entry in Task Manager. Hardware virtualisation being enabled in UEFI merely means the processor feature is available. It does not tell you which hypervisor currently controls it.

Check the Boot Configuration

Open Command Prompt as administrator and run:

bcdedit /enum {current}

Look for:

hypervisorlaunchtype Auto

Auto allows the Microsoft hypervisor to start when a Windows feature or security configuration requires it.

A value of:

hypervisorlaunchtype Off

prevents it from starting for that particular Windows boot entry. Microsoft documents Off and Auto as the supported hypervisorlaunchtype values. (Microsoft Learn⁠)

The absence of the setting does not automatically prove that Hyper-V is disabled. Confirm the actual state through System Information after restarting.

Decide Which Mode You Actually Need

There are three practical ways to operate Hyper-V and VirtualBox on the same Windows 11 PC.

Option One: Keep Hyper-V Active and Run VirtualBox in Compatibility Mode

This is normally the best choice when you need:

WSL2
Windows Sandbox
Hyper-V virtual machines
Memory Integrity
Credential Guard
Company security policies
Only occasional VirtualBox access

VirtualBox uses the Windows Hypervisor Platform rather than controlling VT-x or AMD-V directly.

This arrangement preserves Microsoft’s virtualisation-based features, but VirtualBox performance may be reduced.

Option Two: Disable the Microsoft Hypervisor and Use Native VirtualBox

This is normally considered when:

VirtualBox performance is critical
A particular guest refuses to work through WHP
You depend heavily on existing VirtualBox environments
You require VirtualBox features that behave poorly under Hyper-V
You do not need WSL2, Sandbox or Hyper-V during that session

This provides VirtualBox with direct access to the processor’s virtualisation extensions.

The trade-off is that Microsoft hypervisor-dependent features and security controls will be unavailable.

Option Three: Create Two Windows Startup Modes

A useful compromise is to keep one boot entry with Hyper-V active and a second entry with the hypervisor disabled.

You then choose the required mode whenever Windows starts:

Normal Windows: Hyper-V, WSL2, Sandbox and VBS available
VirtualBox Native: Microsoft hypervisor disabled for better VirtualBox compatibility

This avoids repeatedly installing and removing Windows Features.

It still requires a complete restart whenever you change modes.

Option One: Keep Hyper-V and VirtualBox Together

Start with this method because it preserves Windows security and development features.

Step 1: Update Windows and VirtualBox

Install current Windows updates, restart the computer and install a current supported VirtualBox release from Oracle.

Older VirtualBox versions may not support the Windows Hypervisor Platform properly. Microsoft notes that modern VirtualBox releases support Hyper-V and WSL2 integration through its hypervisor APIs. (Microsoft Learn⁠)

Step 2: Enable Windows Hypervisor Platform

Press Windows key + R, enter:

optionalfeatures

and select OK.

Make sure Windows Hypervisor Platform is enabled.

Depending on what you use, the following may also remain enabled:

Hyper-V
Virtual Machine Platform
Windows Subsystem for Linux
Windows Sandbox

Restart Windows after changing optional features.

Step 3: Start a VirtualBox Machine

Open VirtualBox and start a test machine.

Check whether:

The guest starts successfully
Processor use is reasonable
Disk performance is acceptable
Networking works
USB devices connect
Shared folders work
The application required inside the guest runs properly

The presence of the green turtle indicator means VirtualBox is using the Microsoft hypervisor path rather than its native engine. (VirtualBox⁠)

Step 4: Judge the Real Workload

Do not judge compatibility only by reaching the guest desktop.

Test the operation the machine is actually needed for:

Compile the project
Start the database
Run the legacy application
Connect the required USB device
Test network services
Suspend and resume the machine
Create and restore a snapshot
Shut it down cleanly

A guest may appear functional while performing poorly during the workload that matters.

Option Two: Disable Hyper-V for Native VirtualBox

Disabling Hyper-V should be a deliberate decision, not a generic performance tweak.

Microsoft’s current guidance is that third-party virtualisation products requiring direct hardware access may need Hyper-V, Memory Integrity and Credential Guard disabled. (Microsoft Learn⁠)

Before Making Changes

First:

Back up important files.
Record the current Windows Features.
Export or back up important virtual machines.
Confirm that you have the BitLocker recovery key.
Check whether the device is managed by an organisation.
Confirm which Hyper-V-dependent services you actually use.

Changes to boot and security configuration can cause BitLocker to request its recovery key because Windows may interpret them as a possible unauthorised change. (Microsoft Support⁠)

Do not modify virtualisation-based security on a business device without the organisation’s approval.

Disable the Hyper-V Hypervisor

Microsoft provides the following PowerShell command:

Disable-WindowsOptionalFeature `

-Online `

-FeatureName Microsoft-Hyper-V-Hypervisor

You can also use an Administrator Command Prompt:

DISM /Online /Disable-Feature /FeatureName:Microsoft-Hyper-V-Hypervisor

Microsoft documents both methods for stopping the Hyper-V hypervisor feature. (Microsoft Learn⁠)

Restart the computer.

Review Other Virtualisation Features

Open:

optionalfeatures

Depending on your requirements, review:

Hyper-V
Virtual Machine Platform
Windows Hypervisor Platform
Windows Sandbox

Turning off Virtual Machine Platform will prevent WSL2 from starting because WSL2 requires that component. (Microsoft Learn⁠)

Review Memory Integrity

Open:

Windows Security > Device security > Core isolation details

If Memory integrity is on, the Windows hypervisor may still be required.

Turning it off reduces Windows kernel protection. Microsoft describes Memory Integrity as an important defence against attempts to compromise kernel-mode code and memory. (Microsoft Learn⁠)

Restart after changing the setting.

Review Credential Guard

On eligible business devices, Credential Guard may also start virtualisation-based security.

Its configuration should be reviewed through:

Microsoft Intune
Group Policy
Registry-based policy
The organisation’s security baseline

Microsoft’s Group Policy location is:

Computer Configuration

> Administrative Templates

> System

> Device Guard

> Turn On Virtualization Based Security

Setting this policy to Disabled can disable Credential Guard when it was not configured with UEFI lock. Microsoft provides a different process for installations protected by UEFI lock. (Microsoft Learn⁠)

Do not attempt to remove a UEFI-locked company security control without authorised support.

Prevent the Hypervisor Starting at Boot

Open Command Prompt as administrator and run:

bcdedit /set hypervisorlaunchtype off

Restart Windows.

Verify the result through msinfo32. The message saying that a hypervisor has been detected should no longer appear.

Disabling only the boot setting does not uninstall Hyper-V. It prevents the hypervisor from starting for that boot entry.

Restore the Hypervisor Later

To allow the hypervisor to start again:

bcdedit /set hypervisorlaunchtype auto

Restart Windows.

If the optional Hyper-V component was removed, re-enable it through Windows Features or run:

Enable-WindowsOptionalFeature `

-Online `

-FeatureName Microsoft-Hyper-V `

-All

Microsoft documents this command as the supported PowerShell method for enabling Hyper-V on compatible Windows editions. (Microsoft Learn⁠)

Option Three: Create Separate Hyper-V and VirtualBox Boot Modes

This is an advanced but effective option for a workstation that genuinely needs both platforms.

Microsoft supports copying an existing Windows boot entry and modifying the copy. It recommends retaining the original entry rather than changing the only working configuration. (Microsoft Learn⁠)

Step 1: Prepare BitLocker

Confirm that the recovery key is accessible and consider suspending BitLocker protection before editing the Windows Boot Configuration Data.

Microsoft warns that BCDEdit changes require administrator access and can make Windows unbootable when applied incorrectly. (Microsoft Learn⁠)

Step 2: Copy the Current Boot Entry

Open Command Prompt as administrator and run:

bcdedit /copy {current} /d "Windows 11 - VirtualBox Native"

Windows will return a new identifier similar to:

{55556666-ffff-7777-aaaa-8888bbbb9999}

Copy that complete identifier, including the braces.

Step 3: Disable the Hypervisor for the New Entry

Run:

bcdedit /set {NEW-GUID} hypervisorlaunchtype off

Replace {NEW-GUID} with the identifier returned by the previous command.

For example:

bcdedit /set {55556666-ffff-7777-aaaa-8888bbbb9999} hypervisorlaunchtype off

The original boot entry remains unchanged and can continue using:

hypervisorlaunchtype Auto

Step 4: Restart and Select a Mode

At startup, Windows should offer two entries:

Windows 11

Windows 11 - VirtualBox Native

Choose the normal Windows entry when you need:

Hyper-V
WSL2
Windows Sandbox
Memory Integrity
Credential Guard

Choose VirtualBox Native when VirtualBox needs direct hardware access.

Important Limitation

A separate boot entry controls whether the hypervisor starts, but it does not automatically reconfigure every security policy.

If Memory Integrity or Credential Guard is centrally enforced, Windows may attempt to restore or require the hypervisor. Some company policies may also override local boot configuration.

This approach should be tested carefully before it is used on a production workstation.

Why VirtualBox May Still Report Hyper-V After You Disabled It

When msinfo32 continues saying that a hypervisor has been detected, one or more dependencies remain active.

Check:

Hyper-V Hypervisor
Virtual Machine Platform
Windows Hypervisor Platform
Windows Sandbox
Memory Integrity
Credential Guard
VBS policy
WSL2
Corporate endpoint-security policy
The current boot entry’s hypervisorlaunchtype

Also confirm that you performed a full restart.

Shutting down and immediately powering the computer back on may not always test the same startup path when Windows power features are involved.

Do not disable virtualisation in the UEFI firmware. VirtualBox also needs Intel VT-x or AMD-V. Turning the hardware capability off prevents both platforms from using it.

“VT-x Is Not Available” Does Not Necessarily Mean It Is Disabled in BIOS

A VirtualBox error may say that VT-x or AMD-V is unavailable even though Task Manager reports that virtualisation is enabled.

This can mean that Hyper-V already owns the hardware extension.

Check msinfo32 before changing firmware settings.

If the Hyper-V detection message is present, the processor feature is probably enabled—the Microsoft hypervisor is simply using it first.

Hyper-V Is Missing from Windows Features

The full Hyper-V role is unavailable on Windows 11 Home. Microsoft supports it on the relevant Pro, Enterprise and Education editions. (Microsoft Learn⁠)

However, a Windows 11 Home computer can still use:

WSL2
Virtual Machine Platform
Virtualisation-based security
Windows Hypervisor Platform

WSL2 is supported across Windows desktop editions and uses a subset of Hyper-V through Virtual Machine Platform. (Microsoft Learn⁠)

Therefore, a Windows Home user can still experience VirtualBox performance changes caused by Microsoft’s hypervisor even though no main Hyper-V checkbox is displayed.

Should You Disable Memory Integrity for Better VM Performance?

For a temporary laboratory computer with no sensitive data, you may decide that native VirtualBox performance is more important.

For an everyday personal or business computer, the security trade-off deserves much more consideration.

Memory Integrity protects kernel-level code-integrity checks within an isolated environment and restricts memory behaviour that attackers could use to compromise Windows. (Microsoft Learn⁠)

Do not disable it simply because a benchmark is slightly slower.

First test whether the current VirtualBox compatibility mode is adequate. Where the performance remains unacceptable, consider:

Moving the workload to Hyper-V
Using a dedicated virtualisation workstation
Running VirtualBox on another physical computer
Using a separate Windows boot mode
Hosting the VM on a server
Replacing the guest with WSL2 or a container
Moving the workload into a managed cloud environment

Which Platform Should a Business Standardise On?

Running both hypervisors across many unmanaged computers creates additional support complexity.

The organisation must account for:

Different networking systems
Different virtual-disk formats
Separate update processes
Conflicting virtualisation settings
VBS security requirements
VM backup and recovery
USB and hardware access
Licensing of guest operating systems
Data stored inside virtual disks
Unsupported legacy applications
Employees disabling security features locally

Hyper-V may be a stronger fit where the organisation relies heavily on Windows, Microsoft management, PowerShell, Windows Sandbox or VBS security.

VirtualBox may remain appropriate where cross-platform portability, existing appliances or particular development workflows are essential.

The correct decision depends on the workload rather than personal preference.

Common Mistakes to Avoid

Disabling Virtualisation in the BIOS

Both Hyper-V and VirtualBox need the processor’s virtualisation capability.

Disable the Windows hypervisor—not Intel VT-x or AMD-V—when native VirtualBox mode is required.

Removing Every Hyper-V-Related Feature

Do not remove WSL2, Sandbox or security features without first establishing which services depend on them.

Turning Off Memory Integrity Without Understanding the Risk

This removes a Windows kernel-protection layer.

Editing the Registry from an Unverified Guide

VBS and Credential Guard can be managed through several overlapping policy locations. Random registry scripts can leave Windows in an inconsistent or less secure state.

Changing BCDEdit Without a Recovery Plan

Microsoft warns that incorrect BCDEdit changes can render Windows unbootable. Keep the original boot entry and confirm that the BitLocker key is available. (Microsoft Learn⁠)

Assuming Installation Means Coexistence

Hyper-V and VirtualBox can both be installed simultaneously. The real question is whether the required machines run reliably under the active hypervisor configuration.

Ignoring Company Policy

Security settings may be intentionally enforced by Intune, Group Policy or Microsoft Defender for Endpoint.

Do not bypass them to improve one local VM.

A Practical Troubleshooting Checklist

When VirtualBox and Hyper-V appear to conflict:

Update Windows.
Update VirtualBox.
Confirm that hardware virtualisation is enabled.
Run msinfo32.
Check whether a hypervisor is detected.
Identify whether you use WSL2, Sandbox or Hyper-V.
Check Memory Integrity.
Check whether Credential Guard is active or managed.
Decide whether Hyper-V compatibility mode is acceptable.
Enable Windows Hypervisor Platform where required.
Test the actual VirtualBox workload.
Look for the green turtle indicator.
Avoid disabling security merely for a small performance gain.
Back up virtual machines and important files.
Confirm that the BitLocker recovery key is accessible.
Use hypervisorlaunchtype off only when native VirtualBox is genuinely needed.
Consider creating a separate VirtualBox-native boot entry.
Restore hypervisorlaunchtype auto when returning to Hyper-V.
Verify the state again after restarting.
Contact IT before changing a managed business device.

How Hamilton Group Can Help

Hyper-V and VirtualBox conflicts can involve more than two applications.

The underlying configuration may include:

Windows edition and licensing
UEFI virtualisation settings
Hyper-V
Windows Hypervisor Platform
Virtual Machine Platform
WSL2
Windows Sandbox
Memory Integrity
Credential Guard
BitLocker
Group Policy
Microsoft Intune
Endpoint-security software

Hamilton Group’s experienced IT team can determine exactly which component is starting the Windows hypervisor and recommend the safest configuration for the workload.

We can help with:

Hypervisor Assessment

We can establish whether Hyper-V, VirtualBox, WSL2, containers or a cloud-hosted environment is the most suitable platform.

VirtualBox Performance Problems

We can investigate poor performance, failed machines, hardware-virtualisation errors, network issues and compatibility-mode limitations.

Safe Hyper-V Configuration

We can configure virtual switches, storage, checkpoints, guest security and virtual TPMs.

Separate Startup Modes

Where both native VirtualBox and Hyper-V are required, we can configure and test separate Windows boot entries while protecting BitLocker recovery.

Business Security

We can ensure that virtualisation changes do not accidentally disable Memory Integrity, Credential Guard or centrally managed security controls.

VM Migration

We can help migrate workloads between VirtualBox, Hyper-V and other supported platforms when maintaining both products no longer makes sense.

Recovery and Troubleshooting

We can recover machines that no longer boot, repair damaged virtual networks and restore access to important virtual disks.

Hamilton Group aims to make first contact on IT support requests within 15 minutes, helping businesses get timely assistance when a virtualisation problem prevents access to important systems or development environments.

Get Hyper-V and VirtualBox Working Properly

Hyper-V and VirtualBox do not conflict because either product is inherently broken.

They conflict because both are built to control the same processor-virtualisation features. Modern VirtualBox can coexist with Hyper-V by using Microsoft’s hypervisor platform, but that compatibility can come with reduced performance.

The best solution is to choose deliberately between:

Hyper-V active with VirtualBox compatibility mode
Native VirtualBox with the Microsoft hypervisor disabled
Separate Windows startup modes for different workloads

Call 0330 043 0069, book a meeting with one of our experts or visit hgmssp.com for experienced help with Hyper-V, VirtualBox, WSL2 and Windows 11 virtualisation.

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