EErrorHarbor
Error Library

A Hypervisor Has Been Detected: What It Means & When to Fix It

In Windows System Information or systeminfo, “A hypervisor has been detected” is a state indicator, not a failure by itself: Windows has already loaded a hypervisor, so the normal Hyper-V hardware-requirement lines are not shown. Diagnose the application or feature that is actually failing before changing Hyper-V, VBS, Memory Integrity, Credential Guard or boot configuration.

Windows Hyper-VWindows 10/11 · Windows ServerLast reviewed Sep 27, 2026
🎯 You’re likely in the right place if:
System Information or systeminfo says A hypervisor has been detected.A third-party virtualization app reports a Hyper-V or hardware virtualization conflict.You are trying to determine whether the Microsoft hypervisor is active.
Choose the path that matches what you see
Hyper-V / WSL2 / Sandbox worksStop here: the message is expected and does not need to be removed.
VMware Workstation also worksKeep the current security setup unless you have a measured performance or compatibility reason to change it.
VMware/another hypervisor fails to startCapture its exact error and verify the installed product/version's Hyper-V/WHP compatibility before changing Windows security state.
Third-party VM starts but nested virtualization failsThat is a different boundary: the host hypervisor may work while VT-x/AMD-V exposure to the guest does not. Follow the nested-virtualization guide.
You plan to disable Hyper-VAccount for Memory Integrity, Credential Guard, WSL2, Sandbox and other dependent features first.
Difficulty: ModerateRisk: Low first
🔎 Quick Check — confirm whether the Windows hypervisor is running

Open System Information and look near the Hyper-V requirements section. The detected-hypervisor message confirms that a hypervisor is already loaded.

msinfo32

Interpret: If System Information shows A hypervisor has been detected. Features required for Hyper-V will not be displayed., you have confirmed the current host state. You have not yet proved that this state causes the application problem you are investigating.

Did System Information confirm an active hypervisor?
ADSENSE · reserved slot after the first useful step

Why this happens

Microsoft documents this output as an indication that a hypervisor is already running. That can be expected when Windows virtualization or virtualization-based security features are active. Compatibility depends on the third-party product/version and workload: some current virtualization products can operate through Windows hypervisor interfaces, while specific features or nested-virtualization scenarios can still require a different host configuration.

Diagnose before changing more

1
Are you troubleshooting Hyper-V itself?
If Hyper-V works, the message is not an error and does not need to be removed.
2
What exactly fails in the third-party hypervisor?
Capture the product/version and exact launch, performance or nested-virtualization error. Do not infer incompatibility from the Windows informational message alone.
3
Are Memory Integrity or Credential Guard enabled?
Microsoft notes that Windows security features can depend on Hyper-V and may keep the hypervisor active.
4
Does the installed product/version support Hyper-V/WHP coexistence?
If yes, test that supported mode before weakening host security. If the vendor documents a limitation for the exact feature you need, then evaluate the trade-off.
5
Is the actual requirement nested virtualization?
A VM can run successfully while guest VT-x/AMD-V exposure fails. Keep that failure separate from ordinary host hypervisor detection.

Fix #2 — leave the hypervisor enabled if Windows features depend on it

If your goal is to use Hyper-V, Windows Sandbox, WSL2 or virtualization-based security, the detected-hypervisor message is expected. Troubleshoot the specific feature instead of trying to remove the message.

🟡 Before changing configuration: Disabling Hyper-V can affect security and virtualization features that depend on the Microsoft hypervisor.

Verify: The Windows feature you actually need should launch normally. The informational hypervisor message may remain—and that is expected.

Did Fix #2 work?

Fix #3 — change host hypervisor/security state only after compatibility is proven

If the exact third-party product/version or required feature is documented to need direct hardware virtualization that cannot coexist with the current Windows hypervisor/VBS state, plan the change as a host security and feature trade-off. Inventory dependent features first, use vendor/Microsoft-supported procedures, reboot as required, and keep a rollback path. Do not disable protections merely to make the informational message disappear.

systeminfo
🟠 Security-impacting change: Record the current configuration and confirm whether WSL2, Sandbox, Memory Integrity, Credential Guard or organizational security policy depends on the hypervisor. On managed devices, do not override policy locally just to test a virtualization application.

Verify: After the required reboot, use System Information again and test the third-party hypervisor. Judge success by the app working, not merely by making the message disappear.

Did Fix #3 work?

What not to do

Do not disable Memory Integrity or Credential Guard only because System Information says a hypervisor is detected.Do not assume current VMware Workstation always requires Hyper-V to be off; supported versions can use Windows Hypervisor Platform on compatible systems.Do not make boot-configuration changes unless the exact virtualization application/feature actually requires a different host hypervisor state.Do not use disappearance of the System Information message as the success criterion; verify the workload that originally failed.Do not disable organization-managed VBS/Credential Guard/Memory Integrity controls to work around a local VM without authorization.Do not classify a nested-virtualization failure as ordinary Hyper-V coexistence merely because both mention VT-x/AMD-V.

Still seeing the error?

If the message remains after the Hyper-V role was intentionally disabled, do not repeatedly remove/reinstall the role. Inspect whether another Windows virtualization or security dependency is still causing the hypervisor to start, and compare that state with the exact requirement of the application you are troubleshooting. The message itself is not evidence of malware or a broken Windows installation.

Before escalating, capture:Windows edition/build and whether Memory Integrity is enabledthe exact VMware/virtualization product and versionwhether WSL2, Sandbox or Credential Guard is required on this PCthe exact launch/performance/nested-virtualization error from the third-party hypervisorwhether the vendor documents Hyper-V/WHP coexistence for that exact product/versionthe observed VBS/security state on this PC, not a forum example from another machinethe exact workload used to verify success after any host-state change

References and related guides

VMware Nested Virtualization Not SupportedIf VMware ends with Module HV power on failed and the guest needs nested virtualization, diagnose that boundary →Microsoft: Virtualization apps can't run alongside Hyper-VHow to detect the running hypervisor and why conflicts occur →Microsoft: Hyper-V host requirementsOfficial Hyper-V requirements and detected-hypervisor output →Broadcom: VMware Workstation with Hyper-V/WHPCurrent Workstation behavior, detection and trade-offs with Hyper-V/WHP →

Virtualization failure map

Use the exact failure stage to avoid applying a Hyper-V or VMware fix to the wrong problem.

Nested virtualization / Module HVVMware cannot expose VT-x/EPT or AMD-V/RVI to a guest that needs nested virtualization. →Hypervisor still detected after disabling Hyper-VHyper-V role is off but VBS or another dependency can still keep the Windows hypervisor active. →VMware unrecoverable error (vcpu-0)Workstation crashes; preserve the exact exception and vmware.log before changing host virtualization. →Operating System Not FoundThe VM powers on but firmware cannot find a bootable guest OS; start with disk and boot path. →Virtualization Troubleshooting HubCompare all five VMware / Hyper-V failure paths →

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