Patent ID: 8239664

Claim:
A dual BIOS program protecting method for protecting a first BIOS program and a second BIOS program of a computer system, the dual BIOS program protecting method comprising steps of: switching a flag from a first status to a second status during the refreshing of the first BIOS program; switching the flag from the second status to the first status if the first BIOS program is successfully refreshed; and generating a first control signal if the flag is in the second status when the computer system is booted, and allowing the second BIOS program to enter a write protection mode according to the first control signal, and the first BIOS program is corrected through the second BIOS program, wherein after the first BIOS program is corrected, the flag is switched from the second status to the first status, a second control signal is issued, and the second BIOS program enters a readable and writable mode from a read only mode according to the second control signal.