At school, there's nothing you can do but suck it up and deal. Of course a lab exercise like this, when everyone can see that Microsoft sucks, is a great time to bring up Linux. All your classmates have heard that "you gotta be crazy to use Linux". But have they heard "Linux is better in so many ways"? Quite frankly, this is your chance to talk up Linux. Whip that live cd out of your back pocket - you do carry one everywhere you go, right? - and show them the real shit. Or bring a laptop to class and dazzle people with your pornographic desktop wallpaper - oops, I mean dazzle people with your lack of antivirus software, your free art program, your free word processor, and all the other shit. If Windows was as ridiculous as you say it was, show them that there is an alternative.
However, make sure you're not exaggerating. After you've been free of Windows for awhile, everything about Windows seems to suck royally. But it's a mistake to ramble on about inconsequential shit - "In a real fucking operating system, you can see the date next to the clock" - that just alienates people. If Windows is truly fucking up, causing you to not be able to get work done, show them how Linux is different.