To their surprise, the BIOS password prompt disappeared, and Alex was able to access his laptop. The password was a combination of the keys corresponding to the hint numbers: F8-5-4-2.
When prompted for a password, enter three times in a row. Dell Bios Password Unlock Key Hint Number
If you are locked out of your Dell laptop or desktop BIOS, follow these steps to retrieve the code: To their surprise, the BIOS password prompt disappeared,