The means were pretty mild. Leveraging a monopoly on desktop software to force people to see IE as their default browser, pricing your product so low operating systems centered around spinning teapots can't possibly compete, and so on?
The nerdrage over all that was a little hard to take seriously even before we had historical perspective on it.
edit: I'm actually HAPPY that MSFT were found guilty of abusing their monopoly power. I just want to keep it in perspective, not just in the omg BillG is saving the world perspective, but frankly in perspective relative to all the evil that corporations are capable of doing...
I fully agree with you in this particular case; it's clear the philanthropist has added more value to humanity than was taken away. Still, it's worth evaluating the person within different contexts: a ruthless businessman taking a run at Sainthood. Quite the dichotomy.