Dell Inspiron BIOS Password Recovery
Each Dell Inspiron has a master password which will clear the BIOS password. You can get this number by calling Dell Technical Support at (800)624-9896.
Dell Technical Support will request the Service Tag and Express Service Code from the bottom of your Inspiron.
If you were not the original owner of the Inspiron, Dell will transfer registration of the used Inspiron from the original owner with only the Service Tag and Express Service Code from the tag on the laptop.
To transfer the registration of a used Dell Inspiron, fill out the Transfer of Ownership form on Dell's web site.
Sure can – you’ll have to force the BIOS to default itself to wipe out the boot-lock password. Most motherboards have a recovery process, usually a jumper, that allows you to wipe any configured settings and reload the BIOS defaults.
This will not affect the data on the hard-drive, but will clear out the password and allow the PC to boot to windows properly