I got the same error while starting a Windows7 VM on Arch for the first time after installing VirtualBox.

In my case running

$ modprobe vboxdrv

gave no output (though there was no FATAL error as OP faced).

Running rcvboxdrv seemed to do the trick:

$ sudo /sbin/rcvboxdrv
Unloading modules: vboxdrv 
Loading modules: vboxnetadp vboxnetflt vboxpci vboxdrv 

No reboot was required! The VM worked fine after that.

I got the same error while starting a Windows7 VM on Arch for the first time after installing VirtualBox.

In my case running sudo modprobe vboxdrv gave no output (though there was no FATAL error as OP faced). Also sudo /sbin/vboxconfig command was not found.

Running rcvboxdrv seemed to do the trick:

$ sudo /sbin/rcvboxdrv
Unloading modules: vboxdrv 
Loading modules: vboxnetadp vboxnetflt vboxpci vboxdrv 

No reboot was required! The VM worked fine after that.