You need a provide a code that you see on the screen along with model number. This way I can unlock it for you.
dell inspiron 15-3521
This model is too new and unlikely to unlock. You can try this password:
AkDcI6Opm0qqWnCOIf this doesn't work then it will not unlock.
no it didn't work but thanks anyway I always get bios passwords to remove here at the shop I work at. I have a Lenovo T430 also I will get back with you when I need help on other computers thank you.
Lenovos are tricky and have a chip that physically needs to be replaced to unlock. Mostly I unlock Dells, Acers, Hp etc, but it all depends on model number type of bios etc. Absolutely, if you have something that is able to be unlocked then I would definitely give it a go.
You may want to try these passwords as well. I just got ahold of newer dell software.