Asus Motherboard P5MT-S - Manual (Page 98)

4-40 Chapter 4: BIOS setup
Load Setup Defaults
Select this option then press <Enter> to load the optimized settings for
each of the Setup menu items.
When a confirmation window appears, select [OK] then press <Enter>
to load the default settings. If you wish to cancel the command, select
[Cancel] then press <Enter> to return to the Exit menu.