Windows Is Free (A TLUG Article)
"I'm not one for conspiracy theories, but the next logical question is, assuming I've made some sense up to now, isn't it in ultimately in Microsoft's interest to allow pirated copies of Windows to be out there?"
And with that quote, the author hits the nail right on the copyrighted head.
In a speech at the University of Washington back in 1998, Bill Gates was famously quoted as saying (about China's booming PC market), "And as long as they're going to steal it, we want them to steal ours. They'll get sort of addicted, and then we'll somehow figure out how to collect sometime in the next decade." [Source]
It's a pretty long read, this article about Windows technically being just as "free" as Linux, but it's very well written.