Re: Do what I've done
Have an upvote from me!
I went one small step further. Mint 17 is the host system in which I live for all my regular needs, with a copy of Win 7 available as a guest in VirtualBox - and like yours it never talks to the net, ever. I rarely have any use for M$ these days, but it is there at a single click of the mouse if ever I want it. No need to reboot if you want Windows.