It is such a hassle to use a pirated version of WIndows.
You cannot upgrade Windows 7 with a pirated Vista/XP.
I remember for my previous computer, and still usable by the way, requires to crack/bypass WGA for whatever Microsoft program you download.
With a legit Vista cd key for this current computer, I could care less how WGA works or wants to validate stuff.
A lot of ppl are doing the $10 off at FS to get Windows 7, the only price is paying $2 for shipping, so you're really only saving $8.