Kevin Turner, chief operating officer of Microsoft Corp., stage right, Panos Panay, general manager of Microsoft Surface, center, and Melinda George, Times Square store manager, attend the Microsoft Corp. store grand opening in New York, U.S., on Thursday, Oct. 25, 2012. Microsoft Corp. introduced the biggest overhaul of its flagship Windows software in two decades, reflecting the rising stakes in its competition with Apple Inc. and Google Inc. for the loyalty of customers who are shunning personal computers and flocking to mobile devices. Photographer: Ramin Talaie/Bloomberg via Getty Images