virtualbox.org

I have same problem: when creating/running a vm while "A hypervisor has been detected" under systeminfo, the vm is always green turtled. Last night I uninstalled the virtualbox, tried all the hyper-v disable thing, power off and reboot after 2 minutes, and finally I come up with a case when "A hypervisor has been detected" is not shown. I was then able to install virtualbox and then a ubuntu 20.04.4 image without a problem. I installed some programs I need in the ubuntu, including a trick to make the window scaling (See https://www.youtube.com/watch?v=x5MhydijWmc at 16'45"), and everything worked perfectly. I then saved the vm image and exit, and reboot the PC. Then when I restart the vm using the saved image, I noticed a quick "can't read xxx" error message flashed, and the vm is green-turtled again!

I can't make the green turtle go away so tried the same things again: close all running programs, uninstall virtualbox, set the hyper-v off and poweroff stuff, but I can not get rid of "A hypervisor has been detected" anymore even after 3 tries. And of course trying to install a vm immediately shows a green turtle even in the setup stage.
Does anybody know how to find the "hypervisor that has been detected" so I can do something about it?
My setup: Dell Precision 5560 with windows 10 Enterprise. Version: 20H2, OS build: 19042.685, Experience: Windows Feature Experience Pack 120.2212.551.

Swipe the whole PC and reinstall may work, but it is way too much work. And there is no guarantee it won't happen again, unless I can find the program/service that started the hypervisor, and stop the program/service.

Thanks.

In HMR3Init: Attempting fall back to NEM (Hyper-V is active) is an explanation of what to do if you cannot get Hyper-V turned off, and something that may prevent you getting Hyper-V turned off, which something might be implied by:

abc12346 wrote:Dell Precision 5560 with windows 10 Enterprise.

Split to a separate topic.

Thanks all for the help. I was able to solve this problem by following the following instruction from https://docs.microsoft.com/en-us/window ... ard-manage I was kind of afraid to manually edit the register entry since I don't know exactly what it mean and very hard to remember how to revert back later. The value I deleted was 0 which is equivalent to no hyper-v so i did not think I should delete it before. I was desperate yesterday so I deleted them. And now green turtle is gone after reboot.

Oh no! the problem happens again! After reboot, systeminfo under cmd.exe shows A hypervisor is detected again, which makes the virtualbox VM a second tier citizen and thus the green turtle.
Is there any way to find out which service that triggered the hypervisor?
Thank you!

Is your PC "standalone", or is it member of a domain managed by other administrators?