Okay.... from what I'm understanding of your description you have all of your computer stuff on a single powersource so you can shut them all off at once. You upgraded your computer, and now your computer shutdown completely, rather than going into standby/hibernation. When he changed your bios..... he physically changed a piece of hardware, added software to it, changed something in the settings ????? From your clues I'm guessing that your running windows 98?? Either way your BIOS should have the option to suspend on shutdown, rather than power down, so help us out with those questions, and we'll find a cure.....By the way , do you know the name of the new BIOS, that'd help too