Y'know...
Yes, yes I did. But here's the weird thing: after the fact, with
all of the MS OS'es I have used - DOS 6.22, Windows 3.1/3.11, Windows '95, Windows '98, Windows 2000, Windows XP, Windows Vista and now Windows 7, I have at
some point gotten a legitimate copy.
Starting with XP, I got it just because I got tired of all of the WGA/keygen programs and "preactivated" versions being basically humongous rootkits masquerading as the OS

The copies of DOS, and all Windows prior to XP I got
after the fact - some of them, I have
no idea how I wound up with them. My OEM copy of Windows 98 SE? Nope, no clue where that came from. Same with Windows '95. I was looking for a blank CD-R one day and opened up a jewel case and there sat Windows 3.11 on CD (Dell OEM). No idea how I got that.
I bought Windows 2000 a few months ago at a used book store for $10. In box, with jewel case, original receipt, everything. Very neat (got a copy of Office 2000 with it for $15, but sold that with a PC I threw together to make a few extra bucks).