hyperv and virtualbox

Reference:  https://derekgusoff.wordpress.com/2012/09/05/run-hyper-v-and-virtualbox-on-the-same-machine/

To disable Hyper-V in order to use VirtualBox, open a command prompt as administrator and run the command:

bcdedit /set hypervisorlaunchtype off

You’ll need to reboot, but then you’ll be all set to run VirtualBox. To turn Hyper-V back on, run:

bcdedit /set hypervisorlaunchtype auto

and then reboot.