use another pc and put the bios updates on your mb. use the usb flashback with the power off on the mb. start with 0906 then 1015 then the last one 120x. one of them for new cpu code...one for ram the last one for usb devices.
also when you reset the bios to default make sure you dont haqve efi cd-rom as the first boot device...you want the normal cd-rom as first boot device.