Sanjay Kumar has stepped down as chairman and chief executive of Computer Associates (CA) and resigned from the board.
He will take on the new role of chief software architect. CA said it is launching a search for a new chief executive, and expects to name an interim chief executive shortly.
CA is currently under investigation by the Securities and Exchange Commission and the district attorney's office of East New York over previous accounting practices.
Four former senior executives have already pleaded guilty to related charges this year and nine more staff were sacked on Monday.
The company's audit committee found that CA prematurely recognised revenue in fiscal 2000 on the basis of software licence agreements that were signed in a later quarter.
Lewis Ranieri, who has served as the board's lead independent director since 2002, has been elected chairman.
Ranieri said in a statement: "The changes in Sanjay's role are not based on the conclusion that he engaged in any wrongdoing. Nonetheless, the conduct in question occurred during his tenure, and the board felt this action was appropriate.
"We are pleased that Sanjay has agreed to assume the role of chief software architect, enabling CA's stakeholders to continue to benefit from his extraordinary knowledge, expertise and experience.
"He is highly regarded in the industry and has made remarkable contributions to CA's business."
CA said in a statement: "These and previously announced actions are designed to meet the needs of shareholders while underscoring CA's commitment to corporate accountability."
The company said that its audit committee "continues to believe that the company's new business model and financial reporting in fiscal years 2002 and thereafter are unaffected by the accounting practices that were in place prior to the company's adoption of the new business model in October 2000".
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