Mark, you can do whatever challenge you want. I really don't care. You are right, anyone who does not agree with you is wrong. Why are you here and not in the bahama's working for the highest bidder?
...mark, since you seem to take things so personal even though you try to claim you don't, Linus Torvalds wishes he was Bill Gates. 
You should stop projecting, duder. None of this has been 'personal' to me. I like a good discussion about tech stuff. It's what I do for a living (well, work on tech, not talk about it.)
I'm glad you defined what 'usable' means to you. It's true that I can't put together a linux box with a pII, 128mb of RAM and do Photoshop, HD video, and Crysis. So yeah, a linux box would not be 'usable' for you. And that holds true for a lot of people.
I just wanted to make a little 'ol laptop that could do office, browse, youtube, get email, play music, etc, out of a little old piece of crap. That's 'usable' for a lot of people, and, they'd probably NEVER have a crash or a sliver of malware.
I love windows7. I run it at home (dual boot with linux) for netflix, etc. It's stable, fast, and pretty.
Moving on, though, you've been mistaken about *nix security, malware, etc., in comparison to Windows.
I'm not trying to get you or anyone else to go to linux. I'm just correcting misconceptions that you are putting out there, because people listen, and I'd rather they didn't listen to erroneous information, at least not without a counterpoint. I don't really care whether you
like *nix or not. I'm not saying you are 'wrong' for liking windows a lot more.
I'm also no asking you to agree with me about linux security. You can't agree. You agree or disagree with opinions. You can't agree or disagree with facts. I laid out facts. You laid out opinions. I'm not denying you your opinions. That would be dumb.