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

Example: this computer doesn't have vt-x/amd-v enabled. enabling it in the bios is mandatory virtualbox

docker-machine create -d virtualbox --virtualbox-memory=4096 \
    --virtualbox-cpu-count=4 --virtualbox-disk-size=40960 \
    --virtualbox-no-vtx-check default