Several law firms joined forces on Monday to sue Microsoft, accusing the company of misleading shareholders about sales of the Surface RT tablet and calling its entry into the tablet market an “unmitigated disaster.”

The lawsuit, which seeks class-action status, named several Microsoft executives as co-defendants, including CEO Steve Ballmer, former CFO Peter Klein, current marketing leader Tami Reller, and Frank Brod, the company’s chief accounting officer.

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