By giving operating system control to Microsoft, Nokia stands to lose the opportunity to differentiate its smartphones from the competition, and risks making its smartphones a commodity.

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This move to exploit social network sites would also fuel a move away from attacks that exploit vulnerabilities in the Windows operating system to gain control of a PC or steal data.

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The introduction of Windows smartphones has been the big change under chief executive Stephen Elop, who phased out the Symbian operating system shortly after he took control of the company in 2010.

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