Microsoft monopoly?

It seems as though that we are somewhat forced to use Microsoft products. They are lots of various software developers for nealry any thing you need done, as far as computer software related. It is hard not to learn how to use Microsoft products because majority of schools and busnesses do use these products. When you shop for a computer, majority of the computers for sale have Microsoft software already installed such as the operating system, as well as software like Microsoft Works and Microsoft Office. Microsoft almost seems a popular household name, especially for those with a PC. If a consumer does use MAC and Apple, they consumer still knows about Microsoft. However, a Microsoft user does not always know about the MAC. Does this mean that Microsoft has a monopoly, more or less, in this market?