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Photo by: Elaine Thompson

Employees look on as Microsoft CEO Steve Ballmer speaks via a webcast during an event unveiling a new Microsoft Windows operating system Thursday, Oct. 25, 2012, at the company's headquarters in Redmond, Wash. Designed to run on both PCs and tablet computers, Windows 8 heralds the biggest change to the industry's dominant operating system in at least 17 years. Windows 8 attempts to bridge the gap between personal computers and fast-growing tablets with its touch-enabled interface. The launch event came amid a slew of other tablet offerings ahead of the holidays. (AP Photo/Elaine Thompson)

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