A Microsoft Corp. Surface tablet sits inside the company's store during its 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