Attempting to launch VirtualBox in Ubuntu 16.04 produces an error about the vboxdrv module not being able to load, then another error about /usr/lib/virtualbox/VirtualBox not being found.
$ virtualbox
WARNING: The vboxdrv kernel module is not loaded. Either there is no module
available for the current kernel (4.10.0-35-generic) or it failed to
load. Please recompile the kernel module and install it by
sudo /sbin/vboxconfig
You will not be able to start VMs until this problem is fixed.
/usr/bin/virtualbox: 111: exec: /usr/lib/virtualbox/VirtualBox: not found
To obtain VirtualBox, I downloaded the .deb file from the website and installed it from local using:
sudo dpkg -i virtualbox5.1_5.1.28-117968~Ubuntu~xenial_i386.deb