The system battery of my second hand PC (P3, 533 MHz, 6.5 GB HDD, Win 98) is dead. Whenever I boot my computer I have to press F1 key. I replaced the system batery with a new one and tried to enter into the BIOS setting pressing <DEL> while booting. However I couldn't enter the BIOS setting as it is protected with an unknown password. Plz help me in entering the BIOS setting.