Hmmmm.. If it's one of ours then they all use the same bios manufacturer and pressing Delete should do it - though sometimes they are picky and you have to wait until the message has just appeared on screen.The motherboards we use are made by Gigabyte and they do do some motherboard tweak utilities that run under windows and you may be able to alter the setting from inside there. Their website is http://www.giga-byte.com/