There is no "official" downloadable BIOS password reset tool from Dell. Dell explicitly states that third-party password generation tools are unauthorized and considers them a security vulnerability that could allow attackers to bypass BIOS security.
If you can tell me your Dell model and the System Number/Suffix (the code that appears after three failed attempts), I can help you identify which specific reset method usually works for that generation. How to Reset, Remove, or Recover BIOS Passwords | Dell US dell bios password reset tool download verified
Step 1: Turn on your computer and enter an incorrect password 3 to 5 times until an error code (System Number/Hash) appears. There is no "official" downloadable BIOS password reset
If your Dell system is a commercial model (Latitude, OptiPlex, Precision) from 2011 onwards: Precision) from 2011 onwards: