Stubborn BIOS password

Do you guys have a effective way of dealing with BIOS password's? we have used various software tools here and have a few laptops which all have passwords but we currently are having problems removing them

Tools used so far

CMOS PWD5
BIOS Cleaner

laptop model is Comaq 6720s

Many Thanks

Find more posts tagged with

Save $250 on 2025 certification boot camps from Infosec!

Book now with code EOY2025

Button

Comments

JDMurray

What does the laptop's manufacturer recommend?

devils_haircut

Dogbert's Blog: BIOS Password Backdoors in Laptops

^^I've used this on a few different brands, and so far it has worked great. Just type the BIOS password incorrectly 3-5 times until you get the error code, then run that error code through the appropriate script from his website. It should give you the password.

I know it doesn't work on every brand out there (IBM/Lenovo especially, since they rely on a TPM).

White Wizard

Removing the CMOS battery will reset the BIOS password, be sure to remove it for a few minutes then re-install.

I know this is a laptop but taking them apart isn't all that difficult so long as you have a way of keeping track of where each screw goes.

I'm surprised no one else has stated this.

devils_haircut

White Wizard wrote: »

Removing the CMOS battery will reset the BIOS password, be sure to remove it for a few minutes then re-install.

Most modern laptops don't have a CMOS battery, hence the scripts. So it will really depend on how old OP's laptop is.

inscom.brigade

dell enterprise laptops have cmos battery's. This one might help might help,,,after you get the error code,, http://bios-pw.org/