====== Switching between Docker and VirtualBox on Windows 10 ======

If you are receiving an error similar to "VT-x is not available (VERR_VMX_NO_VMX)" when starting a VirtualBox Virtual Machine after installing Docker, here is a solution:

===== The Issue: =====

Docker uses Hyper-V. VirtualBox uses VT-x. You cannot have both level 1 hypervirtualization technologies running currently.

===== The Solution: =====

==== To go from Docker to VirtualBox: ====

<code>
# Run from elevated prompt (admin privileges)
bcdedit /set hypervisorlaunchtype off

</code>
==== To go back to Docker: ====

<code>
# Run from elevated prompt (admin privileges)
bcdedit /set hypervisorlaunchtype auto

</code>

A reboot is required in both cases.