You can't have them for free—you pay for Windows in the form of a higher OEM cost for your computer.
EDIT: OP eventually clarified in the thread that they're talking about piracy. So apparently the argument is that because Microsoft products can be pirated, Microsoft isn't a monopoly. Make of that what you will.
Only if you buy an already assembled computer, not if you take the time to assemble the components yourself.
And also as a small fish the higher OEM price is being subsidised by the Fortune 500 companies which buy millions of dollars worth of products from Dell etc.
If you assemble the components yourself, you still don't get Windows for free, you just get out of paying the Windows tax if you intend to install Linux.
Edit: The idea that OEMs only tack on the extra cost to big companies is demonstrably false. For one thing, margins per-item are always lower on bulk purchases, not higher—Fortune 500 do not pay list price on anything. For another, you can see the difference in cost on the Dell XPS 13 by switching between Linux and Windows:
> > If you assemble the components yourself, you still don't get Windows for free, you just get out of paying the Windows tax if you intend to install Linux.
You get Windows for free from the combo of self-assemble + torrenting + Microsoft not pursuing individual users for piracy
> > Dell XPS 13
And that is what I said, if you don't assemble the thing yourself buy the cheapest option from an OEM and then you can get Microsoft products for free if you are a wise guy.
This is a completely useless argument in the context of antitrust. Microsoft falling victim to copyright infringement is not going to cause a judge to say "actually, since so many people steal your stuff, you're not a monopoly after all!"
EDIT: OP eventually clarified in the thread that they're talking about piracy. So apparently the argument is that because Microsoft products can be pirated, Microsoft isn't a monopoly. Make of that what you will.