Virtualbox failed to install?
Solution 1:
The only thing that helped me was uninstalling virtualbox-dkms since that package was in an older version:
sudo dpkg -P virtualbox-dkms
Then I reinstalled virtualbox and it worked.
Solution 2:
Run:
sudo /sbin/rcvboxdrv setup
sudo apt -f install
And if that dosen't work:
sudo /etc/init.d/vboxdrv setup