I've never paid for a Windows license, ever. I sure as fuck didn't for Win 95 when it came out, since us script kiddies figured out pretty fast you can install it with a CD key of all 1's. And then I used Windows 2000 for a long time. So long that I still remember the (stolen, MSDN) license key I used from having installed it umpteen times.
DDTPV-TXMX7-BBGJ9-WGY8K-B9GHM
There, you can have that one gratis and for nothin'. For all the good it'll do you now.
And I still have one of those grey and blue plastic MSDN tackle boxes full of CD's of all the Microsoft stuff. You want a copy of Visual Studio 2003 or something? I got you.