Main image of article Windows Leader Sinofsky Exits Microsoft

Steven Sinofsky, one of the brightest minds behind Microsoft's Windows, will leave the company after 23 years. Julie Larson-Green, who's been with Microsoft since 1993, will takeover his position. Both Microsoft CEO Steve Ballmer and Sinofsky, president of Windows and Windows Live, sent letters to employees announcing the departure. Sinofsky joined Microsoft in 1989 as a software development engineer, and worked on Office, Windows, Windows Live and the new Surface tablet. It's been no secret that he masterminded some of Microsoft's most successful products. In his letter, Sinofsky didn't explain the reasons for his exit, though he did hint that he was looking for a new challenge.