I have a used dell latitude C640 computer, service tag # BLPQ941-595B, that has a BIOS password on it that I do not know. (I bought it used) I downloaded the master password generator but it will not generate an administrative password for this service tag. Dell would not help me because I am not the registered owner. I created a boot disk and tried the DOS DEBUG route and the service tag removal program with no success. I do not want to jump the CMOS pins, as I lack the expertise and I don’t want to damage the motherboard. Can anyone please help me with an administrative bios password?