Frustrated as you may be that others don't share your ideals here, your entire comment is huge, deep red, herring.
And there is much more to monopolies than just 'success', you silly. Ever heard of the Microsoft tax? Every OEM was in a losing position if they dared to offer a non-Microsoft OS among their product lines, as they would be sold their licenses at a higher cost (i.e., not at a monetary discount resulting of a virtuous association between entrepreneurs) than every other player in the game.
Thus, even if there was demand for alternatives, if it didn't overtake the loss incurred by higher cost-licenses then it wouldn't be viable to offer say, Linux machines.