Windows 10 demo
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Microsoft shows off Cortana on PC

Microsoft executive Joe Belfiore demonstrates the firm's Cortana assistant working on a desktop PC for the first time.

Microsoft has announced that its next operating system, Windows 10, will be offered as a free upgrade to owners of devices running Windows 8, Windows 7 and Windows Phone.

Read more: Windows 10 upgrade to be 'free' for one year

  • 21 Jan 2015
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