Monopoly means single, sole supplier. 89.95% (as of 10/14) is not a monopoly. It's exactly 10.15% (as of 10/14) short of being a monopoly. Just because no desktop Linux distribution can market itself out of a paper bag and Apple is happy with high margin low volume machines that doesn't mean Microsoft is a sole supplier.
"being a monopoly is terrible, because people do not have a choice in using a product"
So if I go invent some new item/widget/process/service/whatever that the world has never seen before and I end up doing amazingly well because of it I'm terrible? I'm the first and only supplier so I have a monopoly for no other reason than I had a brilliant idea and brought it to market. That doesn't make me terrible it makes me an innovator. Almost every government of the world will let me benefit from that by granting my a patent on my idea to give me a legally protected monopoly position for about a quarter decade. Nothing about any of that makes me or my fictitious company terrible - other than you and your incorrect definition of and views on monopolies.
Hypothetical situations that refute your ignorant statements aside, Microsoft is not a monopoly. There are competing products and people every day choose to use them. Microsoft is not attempting to stifle the sales of devices that run other operating systems. It even creates markets on those systems; Office for Mac, Office Mobile for iOS & Android, Skype for just about damn everything - and even contributions to Linux, being the largest kernel submitter for 2012 and most of 2013. All of that helps increase the adoption of those platforms. That is not the behavior of an illegal monopolist.
Communism has nothing to do with monopolies, absolutely nothing. Straw-man arguments are the first and last refuge of someone ill equipped to properly debate the topic at hand. If you believe Soviet era Russia only had one supplier for anything your knowledge of history is woefully small.
I know about computing history in the 1990s. Again, it is irrelevant to the Build announcements this week. The Microsoft of 2014 is behaving amazingly well; developing good products and embracing the idea of letting developers use their tools to deploy software on a multitude of platforms, not just those that Microsoft owns.
The only group of people that don't appear to appreciate what was announced at Build are people that just want to have a villain so they can act hurt and repressed. The only villains doing that to them are themselves.