Microsoft Debuts Upgrade To Windows 8 Operating System

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Microsoft CEO Steve Ballmer looks at a display of Windows phones as... News PhotoAdult,Adults Only,Business,California,Corporate Business,Finance,Horizontal,Keynote Speech,Looking,Microsoft,One Man Only,One Person,People,San Francisco - California,Speech,Steve Ballmer,Talking,Telephone,USA,WindowPhotographer Collection: Getty Images News 2013 Getty ImagesSAN FRANCISCO, CA - JUNE 26: Microsoft CEO Steve Ballmer looks at a display of Windows phones as he speaks during the keynote address during the Microsoft Build Conference on June 26, 2013 in San Francisco, California. Microsoft debuted an upgrade to their Windows 8 operating system during the Microsoft Build Conference that runs through June 28. (Photo by Justin Sullivan/Getty Images)