Comment 14 for bug 153819

#1 from Daniel Hahler above worked for me:

> You can probably work around this, by creating the group manually:
> # Create group:
> sudo groupadd vboxusers
> # Add user:
> sudo usermod -a -G vboxusers [yourlogin]
> # Then restart the module:
> sudo invoke-rc.d vboxdrv start

Many thanks!

Dominik