Microsoft corporate vice president Joe Belfiore, of the Operating Systems Group, demonstrates the new Cortana personal assistant during the keynote address of the Build Conference Wednesday, April 2, ... more 
Microsoft corporate vice president Joe Belfiore, of the Operating Systems Group, demonstrates the new Cortana personal assistant during the keynote address of the Build Conference Wednesday, April 2, 2014, in San Francisco. Microsoft kicked off its annual conference for software developers, with new updates to the Windows 8 operating system and upcoming features for Windows Phone and Xbox. (AP Photo/Eric Risberg) less 
1 / 1
Associated Press | Photo By Eric Risberg
Wed, Apr 2, 2014 12:15 PM EDT