The CEO of computer company Hewlett-Packard, Mark Hurd, has resigned from his position after an investigation into sexual harassment uncovered violations of the company’s Standards of Business Conduct.

Though cleared of the sexual harassment allegations, Hurd was found to have had a relationship with the former HP contractor involved. He had then filed multiple expense claims intended to hide the relationship.

Hurd became HP CEO in 2005, taking over from Carly Fiorina. He is considered to have done a great job in turning around the business and taking it onto greater heights, so this will be seen as a major loss for the company.

HP CFO Cathie Lesjak is taking over on a temporary basis until a new permanent CEO can be found and appointed.