You can now make BigBox the shell for windows inside the options of BigBox, so it is essentially the OS. Super easy to switch from it as the shell back to "Normal" windows, maybe this option with a PC might work for you.
Zeosstud
on my two cabinets, I think I saved approx 1 minute in loading time (average between the two) by switching to BigBox Shell. You have to plan a lot ahead in Launchbox, because you loose windows "startup" features - so anything you had starting up with windows you have to migrate to the launchbox startup options.
Its a neat idea, but not something I found useful - as I'm always dropping to Windows to tweak stuff, add new stuff, do maintenance, whatever. Always tinkering. BB Shell prevents that in a way, as when you 'exit' BB, you get a black desktop.