Earlier quoted context omitted.
They have. It was quite a big deal at the time: https://en.wikipedia.org/wiki/United_States_v._Microsoft_Cor... .
Thanks. I didn't know it. Microsoft is still a monopoly on desktop OS, even after this anti-trust investigation. To me, that's weird. Anti-trust didn't work?
A bit off topic, but to me it's interesting that they couldn't extend their desktop OS dominance to the mobile world when they launched Windows Phone with a huge war chest. That must have demonstrated how huge the disjunction is between desktop and mobile use-cases in general, or the strategy should have worked (and could have re-fuelled the anti-trust aspects)