ftp://www.asus.it/pub/ASUS/mb/sock4...00/P4C81006.zip

P4C800 Deluxe BIOS v.1006
BIOS update procedure

1.Don't use EZflash and Afudos to update v.1006
2.Download and unzip P4C81006.zip.
3.Copy all files into the floppy disk,or you might have problem with updating BIOS.
4.Boot the system into DOS prompt.
5.Simply execute "P4C81006.exe" file to update BIOS.
Do not shutdown and restart the system while updating the BIOS!