Microsoft Corp. announced on Tuesday that it had fired its chief information officer Stuart L. Scott for violating company’s policies.

Lou Gellos, a company spokesman refused to be specific in what these violations were and to say why Mr. Scott was fired.

According to New York Times he said: “Stuart Scott’s employment with Microsoft was terminated after an investigation for violation of company policies.”

He also said that he was fired on Friday.

Mr. Scott joined Microsoft in 2005 at first as co-chief information officer, after 17 years at General Electric Co. In 2006 he became chief information officer at Microsoft.

He was the third chief information officer at Microsoft in four years.

Director of research at Directions on Microsoft, Rob Helm said that in cases when executives are fired abruptly “the best explanation is some form of HR violation.”

In the last two years two more executives left the company: Ken DiPietro, formerly head of human resources, and Martin Taylor, head of the services of marketing online. According to Helm in these cases the only reason given is that they want to spend more time with their families.

In September Scott told Computerworld magazine that his job as CIO was more than to make sure that the internal technology of the company is working. He also said that that it was a challenge to be in charge of the world’s largest technology.

“Everyone seems to have input into everyone else’s job,” he said. “It keeps you sharp. Certainly, there are people at Microsoft that think they can do my job, but they really don’t want to do my job. I think that just goes with the territory of any CIO,” L.A. Times quotes.

Mr. Scott was in charge with the information technology infrastructure at the company and reported to Kevin Turner, chief operating officer, who, in return reported to Steven A. Ballmer

Mr. Gellos said that until a successor is fund, Alain Crozier and Shahla Aly will take over Mr. Scott’s duties. Alain Crozier is corporate vice president and Shahla Aly is Microsoft’s general manager.