Smart-device technology has slowly eroded Microsoft's share of the computer market. In this video, Andrew Tonner reviews why he's not a fan of Microsoft. Windows used to dominate the PC world; current research suggests that it will hold only 30% in the future. Andrew explores the market research and offers his thoughts on why long-term investors should avoid Microsoft.

Andrew Tonner owns shares of Apple. The Motley Fool recommends Apple and Google and owns shares of Apple, Google, and Microsoft. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.