configuration has occured

Sometimes when i turn on my computer it says these two things:
1762 configuration has occured
162 configuration has occured

then it says my 20gb hardrive is missing but my 6gb is still there and cdrom to

BUT when i take off the computer for like a half hour then turn it back on it works........for like 15minutes!! then freezes then i restart then same message!!!!!!!!

i updated the bios to like dunno-dunno-2001

can someone help me plz