Docker + Virtual Box = VT-x is not available (VERR_VMX_NO_VMX)

Question

I installed docker. During installation, it complained that you can't have two virtualization environments, and that it would make docker the primary one. I said: "OK."

Now, I need to go back to enabling virtualbox. I uninstalled Docker, hoping it would put things back the way they were, but: no joy.

How do I re-enable virtualization for VirtualBox now that docker is gone?

Note: Virtualization bit is set / enabled on the chip.

OS: Win10 Enterprise.

I did a repair installation. Will now completely uninstall, reboot, say a prayer to the Windows API gods, and try again... — DrDamnit, Dec 13 '16 at 19:01
What if I need _both_ VirtualBox and Docker working on Win10? — Alexander Gonchiy, Aug 31 '20 at 14:30
You cannot run them both at the same time. Docker on Windows is (essentially) creating a Linux VM to handle the kernel name spaces that docker relies on (and which is not available in Windows 10 as of 1 year, 9 months ago when I posted this question). Hyper-V and Docker are not compatible with each other. You have to pick one. — DrDamnit, Sep 14 '20 at 19:57

score 50 · Accepted Answer · edited Apr 25 '18 at 14:34

50

Virtualbox will get upset and not run if Microsoft Hyper-V is enabled.

Here's the solution:

Open command prompt as administrator
- search for 'command'
- right-click then select 'run as administrator'

paste the following command:

dism.exe /Online /Disable-Feature:Microsoft-Hyper-V

Then reboot.

edited Apr 25 '18 at 14:34

David LeBauer

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answered Dec 21 '16 at 00:17

DrDamnit

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Amazing, thanks! Installed docker to play around with but messed up my VirtualBoxes. Make sure to run as administrator – Richard Mar 29 '18 at 11:11
1

Yes. Docker REQUIRES Hyper-V to work in the first place. – DrDamnit Aug 17 '18 at 15:55
You might need to disable Virtualisation Based Security too. https://superuser.com/a/1415967/155706 – Hrobky Apr 02 '19 at 12:18
After reboot, you need to disable Hyper-V in programs and features as described here - https://superuser.com/a/1477432/1137687 – Igor Kurkov Jun 02 '20 at 21:00
``` Error: 0x800f080c Feature name Microsoft-Hyper-V is unknown. ``` – Ivan Borshchov Oct 31 '20 at 12:22

score 12 · Answer 2 · answered Jul 16 '18 at 03:51

12

To complete @DrDamnit answer, it is also possible to disable Microsoft Hyper-V from the menu.

Search for "Turn Windows features on" on the start menu

Disable Hyper-V

Reboot your computer

Voilà

answered Jul 16 '18 at 03:51

Alexis.Rolland

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Docker + Virtual Box = VT-x is not available (VERR_VMX_NO_VMX)

2 Answers2