Any amateur computer technician should know how to reset BIOS passwords that can be setup from within the BIOS because there are times when they need access to change some configuration options such as the boot order or disable functions like AHCI mode. If a password has been set, you cannot enter the BIOS or sometimes even boot the computer itself unless you know it, and this can be a real headache if nobody knows what the password is. It’s becoming increasingly common due to the amount of computers changing hands these days and previous owners have set a password and not passed on that information.

Laptop BIOS Master Password Generator provides HP/Compaq, Sony, Dell, Samsung, Acer, Asus & Fujitsu laptop BIOS master passwords. BIOS Master Password Generator for laptops. Whether you bought it on eBay and it came pre-locked or you set your BIOS password so long ago you can't remember it, for most laptop manufacturers resetting your BIOS password is as easy as.

The most common way that most of us know for resetting or clearing the BIOS password is to physically remove the power from the computer by disconnecting all cables and removing the battery from the motherboard for a few minutes. Another way is to short the clear CMOS jumper on the motherboard itself if one is present. These methods work because on most desktop and a few laptop motherboards, a battery is used to sustain the BIOS/CMOS settings. By cutting off the power, the BIOS/CMOS settings and password will be erased.

If for some reason you’re unable to reset the computer’s BIOS security password by removing the battery or clearing the CMOS jumper, and you don’t know what the password is, here are several options which you can try out to clear it.

Generic Backdoor Default Passwords

Before using any tools that try to reset or make changes to your BIOS, it’s worth seeing if any of the well known backdoor or default passwords that have been around for some time work. Click on the link below to view the list, the passwords are case sensitive.

View BIOS Default Backdoor Passwords

If you can Boot into Windows

CMOS De-Animator is an up to date tool compared to the majority of BIOS hacking/resetting tools out there, and can reset the BIOS password from within Windows. The latest version 2 executable of CMOS De-Animator is compatible with both 32-bit and 64-bit operating systems.

All you need to do is run the tool as administrator (right click -> “Run as administrator”) and click the Proceed button followed by restarting the computer. When your computer boots up, you should see a CMOS checksum error where it allows you to access the BIOS without a password. CMOS De-Animator works by invalidating the checksum of your system’s CMOS memory which resets all settings to default and clears any stored BIOS passwords upon reboot.

CMOS De-Animator also has a basic backup and restore option to give you that extra little bit of added security, the file will be stored with a .dea extension. Do take note of the authors warnings about the problematic nature of using the program on laptops and that usage of CMOS De-Animator is at your own risk. Because of its nature the program will sometimes trigger false positives in antivirus software and on sites like Virus Total.

Download CMOS De-Animator

If you Cannot Boot From Hard Drive or CD

Although disconnecting the power and removing the battery from the motherboard on desktop computers for a few minutes should remove the password, this is much less likely to work on laptops, but it’s still possible on some older models. For extra security the passwords for laptops are usually stored on a separate EEPROM chip which doesn’t rely on the BIOS battery and is unaffected by cutting the power.

If you enter the wrong password a few times on a laptop, there will be a message that the laptop is locked. You will be presented with something like a “System Disabled” or “Password check failed. System Halted” message with some numbers. If this message appears while entering the BIOS you can simply power off and on the computer to remove it and try again. Take note of the number because it’s a valuable piece of information and required to generate the BIOS backdoor password to get back into the laptop.

All you need to do is to have the number to hand and then visit the BIOS Master Password Generator webpage. This website has been setup to let you easily get the possible passwords based on the number entered, simply enter it and press the button. Then look at the results and note all the passwords which are close to your model of laptop.

Try the codes on the locked BIOS message to see if it works, depending on laptop models you may need to press Enter or Ctrl+Enter after entering the code. The codes used are based on the work of “Dogbert” who’s done a lot of research and created a number of small utilities and also Python scripts for unlocking several different brands of laptop.

If the website above or its codes don’t work, visit Dogbert’s Blog where you will be able to find more details about your laptop brand and download a separate master password utility for it. To use one of the programs, simply download the correct one for your laptop and run it, then type in the number and hit enter. The master password will be displayed for you to try and unlock the computer.

You have to run the master password tool on a computer that can boot into Windows and has .NET installed. If you don’t know which tool to use, it’s safe to try all of them until you find the one that matches your laptop.

There are a number of other reset BIOS password solutions on page 2.

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“The most common way that most of us know for resetting or clearing the BIOS password is to physically remove the power from the computer by disconnecting all cables and removing the battery from the motherboard for a few minutes. Another way is to short the clear CMOS jumper on the motherboard itself if one is present. These methods work because on most desktop and a few laptop motherboards, a battery is used to sustain the BIOS/CMOS settings. By cutting off the power, the BIOS/CMOS settings and password will be erased.”

That hasn’t been true for about 10 years or so. It was too easy, so the industry found other ways to safeguard the passwords.

If your laptop is older than about 10 years, it’s worth trying.

HAL9000 Author1 week ago

Doesn’t matter how old it is, it’s still probably the most commonly known method of trying to reset the BIOS password, irrespective of whether it still works or not.

What is password for DEBUG.zip???

HAL9000 Author2 months ago

It’s now on the download page, sorry, that one slipped us by…

Hi Raymond,

Are you sure that Debug command above with
-O 70 2E
-O 71 FF
QUIT

Could unlock BIOS Supervisor Password on Lenovo T440s ?

bubble11 months ago

Thank you very mhch，The stale computer finally can run, see the benefit of your approach，I am a foreigner, did not understand English, little by little，Very thank you for your article

Hello I suffer alto on my Dell inspiron 15
Thank issue is I forgot the BIOS password can you help me plz

Leza1 year ago

I cant get in my admin account even tho its mine i got my laptop 2nd hand so didt get a disk but iv noticed repairing my comp my sound as stopped drivers need reinstalling im unable do iv noticed downloading isnt always dloading ,Windows help pops up ? Can you recoment wot i try ……..

I just removed battery and CMOS and it worked perfectly. Thanks

Teews3 mon

Hp Bios Master Password Generator Download