SOURCE: How to Unlock Dell inspiron 1520 Laptop Password
I is my understanding that you can contact Dell with the service tag, and express code and get the master password to clear forgotten passwords.
SOURCE: dell 6400 bios password lose
general info about reseting bios passwords:
http://www.tech-faq.com/reset-bios-password.shtml
Hardware workaround For dell laptops:
http://www.tech-faq.com/dell-bios-password.shtml
SOURCE: forgot my password to my dell inspiron 1525
Try logging into the computer in safe mode (Tap F8 at start up until you get the menu then select safe mode). From there, see if you can log in as administrator. Often the administrator account will have no password.
If this works, go to Start>Run and type:
net user (insert your user name here) password
That will reset your password to "password". Restart and log in.
If that doesn't work, you need the good old Offline NT Password Reset disk (google is your best friend).
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