Al instalar virtualbox en ubuntu me he encontrado con este erro al arrancar la máquina virtual para instalar el sistema operativo:

Kernel driver not installed (rc=-1908)
The VirtualBox Linux kernel driver (vboxdrv) is either not loaded or there is a permission
problem with /dev/vboxdrv. Re-setup the kernel module by executing
‘/etc/init.d/vboxdrv setup’
as root. Users of Ubuntu, Fedora or Mandriva should install the DKMS package first. This
package keeps track of Linux kernel changes and recompiles the vboxdrv kernel module if
necessary.