Massachusetts is investigating whether Microsoft Corp retaliated against a computer maker for promoting a rival operating system, a possible violation of the company's landmark settlement with the Bush administration and 18 other states.
Lawyers for the state told the judge in the antitrust case that they were investigating other complaints Microsoft said it was complying fully with the settlement as the company claims.
In a court filing made public Monday, Massachusetts said that none of the allegations had been resolved and it would "move forward on an enforcement path should its investigations identify provable violations."
Massachusetts is the only state that has not settled its antitrust claims against the software giant. Its lawyers did not specify which computer maker might have suffered retaliation for promoting Linux software. Companies promoting Linux in varying ways have included IBM, Dell Computer Corp and Sony Corp.
A Justice Department spokeswoman declined to comment.