para quem instalou o virtualbox o original aquele do site
http://virtualbox.org e nao o virtualbox ose, e no entanto todas vez que reinicia o computador e tenta entra em alguma maquina virtual recebe a seguinte mensagem;
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
'/etc/init.d/vboxdrv setup'
as root. If it is available in your distribution, you
should install the DKMS package first. This package keeps track of Linux
kernel changes and recompiles the vboxdrv kernel module if necessary.