Of the myriad challenges Microsoft will face over the next few months, none will be as pressing as persuading Windows and Office users to upgrade to the company´s XP versions.

The Redmond, Wash., software company will preview the Windows XP software this week. As it does, Microsoft (Nasdaq: MSFT) will continue a two-front battle to regain lost ground in the embedded space and contain the growing acceptance of Linux in the enterprise.

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