Re: What about non-connected computers? It Works!
I've done exactly the same thing here. Host is Mint 17, VM is VirtualBox, guest OS's are XP (games not supported through Steam or GoG) and Win7 (a couple of older graphics / CAD type packages). Linux for everything else. VMs have direct internet access completely disabled, and when necessary communicate by passing data through the host. Guest system updates are now irrelevant since they are almost always security updates anyway, and once isolated a stable guest system will run smoothly ad infinitum.
Biting the hand that feeds IT
