I'm running Ubuntu 18.04 in a VirtualBox on a Windows 10 machine.

I'm trying to create and test a Docker swarm by creating a couple virtual machines on my (virtual) Ubuntu OS. (I know, I know. VMs on VMs on VMs. I should just get a Mac). I've downloaded VirtualBox in Ubuntu, and am running the following at command-line:

docker-machine create --driver virtualbox myvm1

Which returns:

Running pre-create checks... Error with pre-create check: "This computer doesn't have VT-X/AMD-v enabled. Enabling it in the BIOS is mandatory"

Virtualization is enabled on my Windows 10 machine:

Task Manager Performance Sccreenshot

Virtualization also appears enabled for Ubuntu, as viewed through the VirtualBox Settings (running on Windows):

Ubuntu Virtualization Settings

I've tried to enable through the Ubuntu BIOS on startup, but I can't seem to get in there to change anything. If I press F2 or F12 or ESC (or any key for that matter), I can see a list of processes running during startup, but don't have any control, and the OS just boots as normal. Ancillary question, is there a BIOS for Ubuntu running on a VM, or just one for my hardware?

I read that perhaps I should disable Fast Startup on my Windows machine, and have done that, but have seen no difference. And my host machine boots up pretty fast anyway, too.


If I run in Ubuntu Terminal,

grep --color vmx /proc/cpuinfo

nothing is returned. Same for svm, which would appear to confirm that virtualization is not enabled or possible. The ultimate question is, how do I enable it?

  • Read the error message carefully: You need to boot into BIOS and simply enable that BIOS setting. On your hardware running your Win 10 host.
    – user535733
    Jul 10, 2019 at 13:29
  • thanks @ user535733. If i'm running a virtual machine on my Win 10 host, doesn't that indicate I have virtualization enabled? See above update.
    – tef2128
    Jul 13, 2019 at 14:18
  • No: Hardware virtualization is a performance feature, not a security feature. You can run virtualization in software without enabling any hardware features...it's merely much less efficient to do so.
    – user535733
    Jul 14, 2019 at 1:28

2 Answers 2


If you want virtualisation INSIDE the guest then you need to enable that in the virtualbox settings.

See https://docs.oracle.com/cd/E97728_01/F12469/html/nested-virt.html

enter image description here

If you wanted something else then perhaps you can clarify your question?


My setup is similar yours and I encountered the same error. The following code fixed the issue for me.

docker-machine create --driver virtualbox --virtualbox-no-vtx-check myvm1

Here's a link where I found it. https://docs.docker.com/machine/drivers/virtualbox/

I hope it helps.

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