My machine is a mish-mash of highly segregated applications that perform specific functions. Seriously though, a monopoly to me is something that exists in which competition has no chance, or there is a lack of competition entirely. Using my definition, Microsoft is not a monopoly. However, competition does exist, and they do have a chance. I never said it was going to be given to them on a silver platter.
Consumers drive the market.
We are the ones who decide which products to use, and in doing so, decide which competitors survive. Let's take a look at the processor market for example. A few years back, there were three major vendors of PC processors. AMD was a much closer contender while Cyrix has pretty much disappeared. If you look now, AMD is not just a contender, but a serious competitor.