Microsoft unveils Windows 8

Associated Press
Corporate Vice President of Windows Program Management, Julie Larson-Green attends the Windows 8 Consumer Preview presentation during a press conference at the Mobile World Congress in Barcelona, Spain, Wednesday, Feb. 29, 2012. A test, or beta, version of the revamped operating system has been unveiled Wednesday in Barcelona, nudging it a step closer to its anticipated release next fall. (AP Photo/Emilio Morenatti)

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Microsoft unveiled Windows 8 for public testing on Feb. 28 in the hope that it will help the brand win back some of the ground it has been losing to Apple and Google. The new operating system works on tablets as well as PCs and laptops, connecting them via the cloud to give users a more consistent experience as they switch between devices.

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