This is not what is meant by a Windows Box
A man who built an entire PC inside a Windows box.
Then he made it so it works with Linux too.
The final step was to take an assembly language MBR boot loader program and modify it to read the state of the tilt switch and make it boot the partition containing Windows XP or the partition containing Linux. To those that don't know the secret of how it works it looks like magic. It boots the right O/S for the box it is in.
(Link thanks to What I Learned Today.)