Reading the original article, and the addendum, it seems there was sexual harassment investigations under way because Hurd is a man, Fisher is a woman (and obviously, an entertainer) and there COULD be questions about improper behaviour since there was professional misconduct.
According to Hurd, Fisher and the investigators, there was no sexual matter worth mentioning to be found - but, there were indeed business misconduct, in Fisher being employed not by HP but by Hurd, and Hurd falsifying HP accounts to compensate.
Or, in short: there was an accounting malpractice, and it got blown into epic proportions because people can't stop their minds from slipping into the gutter.