https://forums.virtualbox.org/viewtopic.php?t=66442

Went to the C:\Program Files\Oracle\VirtualBox\drivers\vboxdrv directory, right clicked on VBoxDrv.inf and selected Install. I then went back to my console and typed ‘sc start vboxdrv’ and got this:

SERVICE_NAME: vboxdrv

TYPE : 1 KERNEL_DRIVER

STATE : 4 RUNNING

(STOPPABLE, NOT_PAUSABLE, IGNORES_SHUTDOWN)

WIN32_EXIT_CODE : 0 (0x0)

SERVICE_EXIT_CODE : 0 (0x0)

CHECKPOINT : 0x0

WAIT_HINT : 0x0

PID : 0

FLAGS :