> If you manually install virtualbox, you can unload the kvm module > manually and load the virtual box modules. You can't have both loaded > at the same time (at least not that I know of), but you can unload > one and load the other. Concretely, before running VirtualBox, run: sudo /sbin/modprobe -r kvm_intel (or maybe kvm_amd if you're not running on Intel processors...) If you want to disable kvm for between reboots, you can blacklist the module.