possibly a hardware issue with your motherboard bios corrupted for some reason.
try clearing the cmos, check manual which jumpers to use ,failing that , next replace mobo battery, may be thats all the problem is.
(note the removal of the battery will reset the bios.)
if error still occurs there is an "ezrestore" utility which may rewrite the bios
before using this util check you have the correct bios bin file & read manufacturers 'how to flash bios' info.