Ray Lane, new chairman of HP, made the allegations in a public letter to the New York Times.
Mr Lane previously worked for software solutions provider Oracle, the firm which recently appointed Mr Hurd as co-president after he left HP due to controversy over expenses and an alleged affair with contractor, Jodie Fisher.
An internal investigation could only confirm irregularities surrounding expenses and a personal relationship between the CEO and Ms Fisher.
In the letter, Mr Lang wrote: âIn hiring Leo Apotheker, HPâs board turned to a principled leader of outstanding personal and professional integrity.
âMr Hurd violated the trust of the board by repeatedly lying to them in the course of an investigation into his conduct.â
In September, HP launched a law suit against Mr Hurd after his appointment by Oracle with the former claiming that he was in breach of contract by taking on the position.
The legal action was subsequently dropped later in the month.
By Jim Ottewill