Your definition of monopoly is wrong. Microsoft was judged by the court to be abusing its monopoly power by bundling IE with Windows and making it difficult to

Your definition of monopoly is wrong. Microsoft was judged by the court to be abusing its monopoly power by bundling IE with Windows and making it difficult to uninstall even though users could still install competing browsers if they spent the extra effort. There's no natural monopoly that you can't find an alternative to if you're willing to spend enough effort.