The issue focused on mobile phones that Microsoft announced during its Windows Phone 8 conference last week. Microsoft officials told reporters at the event that smartphones don't require devices with sensors or processors as capable of computing devices and computers. The shift away from PCs could force Microsoft to upgrade Windows Mobile devices to Windows 10 devices.

Microsoft recently updated Windows Phone software for smartphones, hoping to boost Microsoft's desktop PC sales in smartphones and laptops. Microsoft chief operating officer Terry Myerson said Microsoft plans to expand Windows Phone devices into TVs and