I am not 100% sure but I think I read somewhere that that if from your BIOS
and that you can not shut it off (mine beeps too), but that it is a good thing because it means everything is working fine. I tryed too but was satisfied with the explaination and have learned to live with it. I have a Pheonix BIOS if yours is different you may be able to shut it off in your BIOS but, BIOS is at your own RISK!