Asus Motherboard P5MT-S - Manual (Page 96)

4-38 Chapter 4: BIOS setup
Clear User Password
Select this item to clear the user password.
Password Check [Setup]
When set to [Setup], BIOS checks for user password when accessing the
Setup utility. When set to [Always], BIOS checks for user password both
when accessing Setup and booting the system.
Configuration options: [Setup] [Always]