Microsoft became dominant because of Windows as the primary consumer OS for Intel based architectures (servers run a lot of Linux/Unix), not because of their insanely overpriced Office package. On top of it, their practices (forcing people into SW and HW upgrades by deliberately cutting support), while being less insane than the planned obsolescence shtick of Apple, is hardly a benefit to anyone except those who profit from it. Furthermore, their loudly touted "charity" (providing SW for schools, etc.) is a pittance and merely a well targeted advertisement campaign. So yes, billions of people use MS products, but those billions also paid for those products accordingly. And that other businesses were built on that backbone has nothing to do with the fact that monopolies such as MS, Apple, etc. don't give back to society even a fraction of what they take. But that's something no amount of government intervention will ever solve, because it's a simple matter of greed.