Well, its a genuine HP motherboard which fitted my 10-year old PC perfectly. The original board had developed an intermittent fault on the SATA ports and this replacement cured the problem. I was a bit surprised at power-on that the bios displayed the organisation name of the previous owner but this is easy to edit. After a few hours, Microsoft spotted the hardware change so both windows and office had to be re-authenticated. Worth checking the real-time clock battery before installing. Mine was down to 2.7V.