usercooliscool Then once you have updated all software and rebooted try this from terminal.
sudo eopkg install virtualbox-current
sudo usermod -aG vboxusers $USER
Reboot again and VirtualBox should be ready to run without problems. These instructions assume that you are on the Current build of Solus and not LTS.
The link above suggested by @Staudey will give you most of the information you should need.
Good luck.
