Apparently Bill had an affair about 20 years ago that came to light after the woman wrote a letter to Microsoft. It is unclear if there was any misconduct associated (in addition to the fact that he was married at the time). Once the board heard of this, they launched an investigation and discussed his removal, but he resigned prior to that. Allegedly the resignation had nothing to do with the affair.
Apparently Bill had an affair about 20 years ago that came to light after the woman wrote a letter to Microsoft. It is unclear if there was any misconduct associated (in addition to the fact that he was married at the time). Once the board heard of this, they launched an investigation and discussed his removal, but he resigned prior to that. Allegedly the resignation had nothing to do with the affair.
This take on it from an infidelity support website has some receipts on his other relationships over the years and his icky relationship with Epstein... some of the sources are The Daily Beast, The Independent, and The Hill. I'm just glad Melinda is getting out, still gets to do Foundation work, the kids get to see her being happier, and the foundation can still do amazing work.