Windows 11 Home - Cannot disable Hyper-V ?

[Bascy65]

I'm running into problems with my VirtualBox guest running on a Windows 11 Home host, version 22H2 build 22621.521
The guest (Windows 10) is showing the dreaded turtle and is performing really bad.
I think that things have gone really bad after the last big update of Windows 11 last week, but I wasn't aware of the turtle before investigating this today, so I don't know if the turtle was already showing before the update

SystemInfo shows: A hypervisor has been detected. Features required for Hyper-V will not be displayed.
VirtualBox logging shows: HM: HMR3Init: Attempting fall back to NEM: VT-x is not available (See attachment)

I've tried following numerous post on the internet about disabling Hyper-V components, but have not succeeded:
Optional Feature:
Hyper-V is not listed
Virtual Machine platform is disabled
Windows Hypervisor platform is disabled
Windows subsystem for Linux is disabled

Windows Core Isolation / Memory Integrity is turned off

I tried following several posts on disabling DeviceGuard and SecurityGuard but I don't find any of the registry keys that are mentioned there

Can anybody help me further with this?

[BillG]

Yes, this is a pretty common problem, even on Windows Home. There is a guide on this forum - viewtopic.php?f=25&t=99390

If your problem is that the Windows hypervisor is loaded, the bcdedit method in the guide should solve your problem.

[Bascy65]

I tried all that, but the second commandline command is not successfull because it cannot find the hyper-v feature.

Then I tried it all again, including removing the battery of my laptop for 20+ seconds .. and now its working!
I must have been too impatient the first time I tried this.

[BillG]

Glad to hear you sorted it out.

[JustinH]

I just ran into this using W11 Enterprise when I upgraded from 21H2 to 22H2. According to https://learn.microsoft.com/en-us/windo ... ard-manage, MS forces on Defender Credential Guard in 22H2 Enterprise. I tried the usual things, then started with the more simple solutions on that MS page but could not disable CG. I had to create these reg keys and set to 0 to disable it:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa\LsaCfgFlags
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\DeviceGuard\LsaCfgFlags

[fth0]

W11 Enterprise [...] MS forces on Defender Credential Guard in 22H2

A short notice for shallow readers:

According to the MS source given, this holds true for Windows 11 Enterprise and Windows 11 Education. Not mentioned are Windows 11 Home and Windows 11 Pro.

[JustinH]

Thanks for making that more apparent. I had intended to specify Enterprise but forgot. I amended the post.

So, my scenario is not germane to the OP's since Home shouldn't normally be affected. The OP got my attention because 22H2 was mentioned. I was replying so as to maybe help anyone on 22H2 (Ent).

[Stradman]

I just ran into this using W11 Enterprise when I upgraded from 21H2 to 22H2. According to https://learn.microsoft.com/en-us/windo ... ard-manage, MS forces on Defender Credential Guard in 22H2 Enterprise. I tried the usual things, then started with the more simple solutions on that MS page but could not disable CG. I had to create these reg keys and set to 0 to disable it:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa\LsaCfgFlags
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\DeviceGuard\LsaCfgFlags

This did not seem to work on Windows 11 23H2 Enterprise.

[Stradman]

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa\LsaCfgFlags
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\DeviceGuard\LsaCfgFlags

This did not seem to work on Windows 11 23H2 Enterprise.

I needed to also add/set the following registry key values to 0:

Code: Select all

Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\DeviceGuard\Scenarios\HypervisorEnforcedCodeIntegrity\EnableVirtualizationBasedSecurity

Code: Select all

Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\DeviceGuard\Scenarios\HypervisorEnforcedCodeIntegrity

Not sure if only one was needed. I just set them both.
(Source: https://www.xda-developers.com/disable- ... indows-11/)

[MoinDix]

Hi,

I had the same issue, after a windows update the 'turtle' icon came back again.

The only thing that helped for me was :

go to this page from Microsoft : https://www.microsoft.com/en-us/downloa ... x?id=53337

download the tool & extract

open PowerShell as administrator and execute : DG_Readiness_Tool_v3.6.ps1 -Disable

reboot your pc, it will ask during boot to disable the Device Guard or Credential Guard

KR

MoinDix