Microsoft introduces Windows 8

Microsoft CEO Steve Ballmer gives his presentation at the launch of the company's Windows 8 operating system on Oct. 25 in New York City. Windows 8 is the most dramatic overhaul of the personal computer market's dominant operating system in 17 years.

Richard Drew, AP

People walk past a display at a Microsoft press conference in New York City.

Mario Tama, Getty Images

Microsoft CEO Steve Ballmer talks about the Windows 8 operating system.

Richard Drew, AP

People listen to a presentation by Microsoft CEO Steve Ballmer.

Mario Tama, Getty Images

John Eversole, a marketing manager for Microsoft, uses a Samsung Series 7 Slate device running Windows 8.

Elaine Thompson, AP

Steven Sinofsky, president of the Microsoft Windows group, delivers his presentation.

Richard Drew, AP

A reporter photographs a device running Windows 8.

Timothy A. Clary, AFP/Getty Images

Microsoft CEO Steve Ballmer walks past a display of products running the new Windows 8 software.

Timothy A. Clary, AFP/Getty Images

People play with some of the new devices running Windows 8.

Jason DeCrow, AP, For Microsoft

Employees watch Microsoft CEO Steve Ballmer speak at the company's headquarters in Redmond, Wash.

Elaine Thompson, AP

A Microsoft employee reaches for a cupcake during an event unveiling the new Windows 8 operating system in Redmond.

Elaine Thompson AP

Microsoft engineer Rajas Patil shows off temporary tattoos of the company's logo.

Elaine Thompson, AP