Most BIOS are set purposely by the owner. A lot of BIOS passwords I have seen that are default is "clear". If you cant get into it that way, you will have to find a way to open it up and remove the CMOS battery to reset the BIOS.
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If you know the password you can start the computer and tap the f2 key to enter. The tab to the security screen to add/remove bios password. If you do not know the password you will need to contact Dell Support and have them reset the password. They will verify ownership of the computer and then provide resetting information.
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Dell latitude d600, am installing a replacement HDD, when I boot up laptop a screen comes up asking for password authentication system You cannot access the data on this computer without the correct password Please type in primary or administrator password and enter ????? How do I fix this ???? Tony
Contact Dell tech support 800-624-9896 (USA) confirm you are an authorized user of the system and they will assist with generating a master password, There is no universal password or jumper to manually reset it, you have to contact Dell.