"We’re going to use something called Wubi. This is built into the latest releases of Ubuntu and lets you install Ubuntu as a file within Windows. It makes installing Ubuntu just like installing some Windows software. No drastic repartitioning is necessary and you don’t have to deal with baffling terminology.
"Once installation has finished, you just choose between Windows and Ubuntu when you boot. If you decide you want to get rid of Ubuntu, you can use Add/Remove Programs to get rid of it, like a Windows program.""