This is just sensationalist. Microsoft doesn't have their users by the users choosing Windows from a lineup of software. People use Windows, because that's the de facto PC operating system. It's what people learn in school, use in governments, use to conduct their businesses, play their games on. PC hardware is made for Windows, and PCs are bundled with Windows. That's why Windows is everywhere.

Not because it's relationship with users, but because of its relationships with the avenues leading to users.