I tried to use my Virtual Box and this is the error I received – (I just updated to the new Ubuntu also) and I am VERY new at this Linux OS.
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. Please reinstall the
kernel module by executing
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.