Introduction: How to Bypass BIOS Passwords

BIOS passwords can add an extra layer of security for desktop and laptop computers. They are used to either prevent a user from changing the BIOS settings or to prevent the PC from booting without a password. Unfortunately, BIOS passwords can also be a liability if a user forgets their password, or changes the password to intentionally lock out the corporate IT department. Sending the unit back to the manufacturer to have the BIOS reset can be expensive and is usually not covered in the warranty. Never fear, all is not lost. There are a few known backdoors and other tricks of the trade that can be used to bypass or reset the BIOS

DISCLAIMER
This article is intended for IT Professionals and systems administrators with experience servicing computer hardware. It is not intended for home users, hackers, or computer thieves attempting to crack the password on a stolen PC. Please do not attempt any of these procedures if you are unfamiliar with computer hardware, and please use this information responsibly. LabMice.net is not responsible for the use or misuse of this material, including loss of data, damage to hardware, or personal injury.


Before attempting to bypass the BIOS password on a computer, please take a minute to contact the hardware manufacturer support staff directly and ask for their recommended methods of bypassing the BIOS security. In the event the manufacturer cannot (or will not) help you, there are a number of methods that can be used to bypass or reset the BIOS password yourself. They include:

Using a manufacturers backdoor password to access the BIOS

Use password cracking software

Reset the CMOS using the jumpers or solder beads.

Removing the CMOS battery for at least 10 minutes

Overloading the keyboard buffer

Using a professional service

Please remember that most BIOS passwords do not protect the hard drive, so if you need to recover the data, simply remove the hard drive and install it in an identical system, or configure it as a slave drive in an existing system. The exception to this are laptops, especially IBM Thinkpads, which silently lock the hard drive if the supervisor password is enabled. If the supervisor password is reset without resetting the and hard drive as well, you will be unable to access the data on the drive.


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Backdoor passwords

Many BIOS manufacturers have provided backdoor passwords that can be used to access the BIOS setup in the event you have lost your password. These passwords are case sensitive, so you may wish to try a variety of combinations. Keep in mind that the key associated to "_" in the US keyboard corresponds to "?" in some European keyboards. Laptops typically have better BIOS security than desktop systems, and we are not aware of any backdoor passwords that will work with name brand laptops.

WARNING: Some BIOS configurations will lock you out of the system completely if you type in an incorrect password more than 3 times. Read your manufacturers documentation for the BIOS setting before you begin typing in passwords

Award BIOS backdoor passwords:

ALFAROME ALLy aLLy aLLY ALLY aPAf _award AWARD_SW AWARD?SW AWARD SW AWARD PW AWKWARD awkward BIOSTAR CONCAT CONDO Condo d8on djonet HLT J64 J256 J262 j332 j322 KDD Lkwpeter LKWPETER PINT pint SER SKY_FOX SYXZ syxz shift + syxz TTPTHA ZAAADA ZBAAACA ZJAAADC 01322222
589589 589721 595595 598598

AMI BIOS backdoor passwords:

AMI AAAMMMIII BIOS PASSWORD HEWITT RAND AMI?SW AMI_SW LKWPETER A.M.I. CONDO

PHOENIX BIOS backdoor passwords:

phoenix, PHOENIX, CMOS, BIOS

MISC. COMMON PASSWORDS

ALFAROME BIOSTAR biostar biosstar CMOS cmos LKWPETER lkwpeter setup SETUP Syxz Wodj

OTHER BIOS PASSWORDS BY MANUFACTURER

Manufacturer Password
VOBIS & IBM merlin
Dell Dell
Biostar Biostar
Compaq Compaq
Enox xo11nE
Epox central
Freetech Posterie
IWill iwill
Jetway spooml
Packard Bell bell9
QDI QDI
Siemens SKY_FOX
TMC BIGO
Toshiba Toshiba

TOSHIBA BIOS

Most Toshiba laptops and some desktop systems will bypass the BIOS password if the left shift key is held down during boot

IBM APTIVA BIOS

Press both mouse buttons repeatedly during the boot


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Password cracking software

The following software can be used to either crack or reset the BIOS on many chipsets. If your PC is locked with a BIOS administrator password that will not allow access to the floppy drive, these utilities may not work. Also, since these utilities do not come from the manufacturer, use them cautiously and at your own risk.

Cmos password recovery tools 3.1
!BIOS (get the how-to article)
RemPass
KILLCMOS

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Using the Motherboard "Clear CMOS" Jumper or Dipswitch settings

Many motherboards feature a set of jumpers or dipswitches that will clear the CMOS and wipe all of the custom settings including BIOS passwords. The locations of these jumpers / dipswitches will vary depending on the motherboard manufacturer and ideally you should always refer to the motherboard or computer manufacturers documentation. If the documentation is unavailable, the jumpers/dipswitches can sometimes be found along the edge of the motherboard, next to the CMOS battery, or near the processor. Some manufacturers may label the jumper / dipswitch CLEAR - CLEAR CMOS - CLR - CLRPWD - PASSWD - PASSWORD - PWD. On laptop computers, the dipswitches are usually found under the keyboard or within a compartment at the bottom of the laptop.
Please remember to unplug your PC and use a grounding strip before reaching into your PC and touching the motherboard. Once you locate and rest the jumper switches, turn the computer on and check if the password has been cleared. If it has, turn the computer off and return the jumpers or dipswitches to its original position.


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Removing the CMOS Battery

The CMOS settings on most systems are buffered by a small battery that is attached to the motherboard. (It looks like a small watch battery). If you unplug the PC and remove the battery for 10-15 minutes, the CMOS may reset itself and the password should be blank. (Along with any other machine specific settings, so be sure you are familiar with manually reconfiguring the BIOS settings before you do this.) Some manufacturers backup the power to the CMOS chipset by using a capacitor, so if your first attempt fails, leave the battery out (with the system unplugged) for at least 24 hours. Some batteries are actually soldered onto the motherboard making this task more difficult. Unsoldering the battery incorrectly may damage your motherboard and other components, so please don't attempt this if you are inexperienced. Another option may be to remove the CMOS chip from the motherboard for a period of time.
Note: Removing the battery to reset the CMOS will not work for all PC's, and almost all of the newer laptops store their BIOS passwords in a manner which does not require continuous power, so removing the CMOS battery may not work at all. IBM Thinkpad laptops lock the hard drive as well as the BIOS when the supervisor password is set. If you reset the BIOS password, but cannot reset the hard drive password, you may not be able to access the drive and it will remain locked, even if you place it in a new laptop. IBM Thinkpads have special jumper switches on the motherboard, and these should be used to reset the system.


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Overloading the KeyBoard Buffer

On some older computer systems, you can force the CMOS to enter its setup screen on boot by overloading the keyboard buffer. This can be done by booting with the keyboard or mouse unattached to the systems, or on some systems by hitting the ESC key over 100 times in rapid succession.


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Jumping the Solder Beads on the CMOS

It is also possible to reset the CMOS by connecting or "jumping" specific solder beads on the chipset. There are too many chipsets to do a breakdown of which points to jump on individual chipsets, and the location of these solder beads can vary by manufacturer, so please check your computer and motherboard documentation for details. This technique is not recommended for the inexperienced and should be only be used as a "last ditch" effort.


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Using a professional service

If the manufacturer of the laptop or desktop PC can't or won't reset the BIOS password, you still have the option of using a professional service. Password Crackers, Inc., offers a variety of services for desktop and laptop computers for between $100 and $400. For most of these services, you'll need to provide some type of legitimate proof of ownership. This may be difficult if you've acquired the computer second hand or from an online auction.

Comments

author
etcuts (author)2017-09-14

I have a Toshiba Satellite laptop C75D-A7286 that is bios locked. Any info to reset it would be greatly appreciated.

author
JessicaD166 (author)2017-08-22

the service tag is 5WY27Z1 it's a Dell venue 8 pro need a system or administrative password

author
JessicaD166 (author)2017-08-22

i have a dell venue 8 pro when i turn on there's a Dell logo then system or administrative password don't know what to do bought it off my brother and he forgot code anyways there's a backdoor I don't have a keyboard for it

author
jkullmann (author)2017-06-07

Hi, I have a Lenovo W540 that I need the BIOS password for. Can someone please assist? Type 20BG-0016US and serial number R9-0AEFRH. Thank you

author
Bwanali MwewaE (author)2017-04-28

hi admin,am new on forum hoping to get answers to my question.
I hav a dell latitude E4300 service tag JVGLN4J am having trouble i cant do anything with it unless bios password is entered.
please would you so kind to help me with the password.

author
PhillyP1 (author)2017-03-17

Dell inspiron 11 3000 series 3147
System disable [2B4E22A727C27369]
Service tag:5N1N812

author
BarkatK1 (author)2017-03-12

hi, i have Toshiba Satellite Radius 11.6 with bios password. please do you help me how to remove

author
VanessaP44 (author)2017-03-03

Whats the code to unlock the Bios password for my asus x53e date of 2014/04/12

author
OmerovićM (author)2017-02-16

I have

a dell and I don't know the password

XPS 13 L322X

servicetag BFG7VW1

author
Shamrock39 (author)2017-02-02

Could you please help me with an admin password for a Dell Latitude 6410 laptop. The service tag is 22K0XN1-2A7B. I've tried Dogbert's blog &'related post but to no avail. Thanks for any help or suggestions. Shamrock39

author
JamesB747 (author)2017-01-15

please help me with resetting my dell alienware laptop

startup password

code: 7e909c 78c555 189d

svc tag: 43lryw1

author
SilasKai (author)2017-01-12

Hi admin please , how can I remove bootup password from Toshiba Tecra A10-15c, it requires password as soon as I press the power button

author
LaithL1 (author)2017-01-09

HERE IS HOW I REMOVED MY HP BIOS PASSWORD
THY ALSO SUPPORT MANY BRANDS

http://www.ebay.com/itm/282297214194?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649

author
RomanP54 (author)2017-01-06

ДОБРЫЙ ДЕНЬ. ПОМОГИТЕ ПОЖАЛУЙСТА СНЯТЬ ПАРОЛЬ НА ВХОД В BIOS. DELL LATITUDE E5450 SN:CSGW062-6FF1, EXPRESS SERVICE CODE 27842808026

author
Riff Flanger (author)2016-09-14

anyone needing a master bypass passkey for Dell BIOS, drop me a PM and I might be able to help;

ABCDEFG-1D3B = xvn0qEeftqyrkG52

ABCDEFG-1F5A = x2zL5n7jj2Gl2TIh

ABCDEFG-1F66 = KflK6u2Sk6Ov03GN

author

dell latitude service tag d7p8211 password for bios if you please

author
RyanT164 (author)Riff Flanger2016-12-26

I have a Dell Latitude 3340 that I purchased on eBay with a locked BIOS.. If you can help.

Tag is: 3W8DC32

There is no: -XXXX after that on the sticker on the bottom of the computer, or running [sudo dmidecode] in terminal on Linux. Hope you can help.. I can use the computer as is and have been for months now.. But having access to being able to change boot order would be much appreciated.

author
RyanT164 (author)RyanT1642016-12-26

Also worth noting to anyone else.. If you have a BIOS locked Dell laptop, and you only plan on using it for basic web browsing and don't mind Linux.. You can take the HDD out of that laptop, put it into another one without a locked BIOS, install any distro of Linux that you want, then put said HDD back into your Dell laptop and boot as normal. Everything will boot up and you can set the computer up, it'll work like you just started a new computer for the first time.

This doesn't work when trying it with Windows.. Microsoft has a security measure in check that helps try and stop those types of things from happening, and deactivates your copy of Windows. Since Linux is completely open source and FREE, it all works without a hitch.

That is my input to anyone willing to run Linux that needs a basic laptop for the internet, email, basic computer tasks and isn't afraid crack open a few computers.

author
AngelaS173 (author)Riff Flanger2016-12-16

Hi I have purchased a used Del 6330 tag B38C4X1 it has the Bios locked can you please help me with the master password Thank you in advanced

author
adp102 (author)Riff Flanger2016-11-08

hi i have a Dell D520 Latitude tag 7N68D3J and i need the setup password please can you help?

author
adp102 (author)adp1022016-11-08

Sorry fulll Tag is 7N68D3J-595B

regards

author
Zfranco (author)Riff Flanger2016-10-17

Please Help for dell Latitude E5540 Tag Num =
93QNL32-1F66

author
DonselfL (author)Riff Flanger2016-10-07

Please help for Lenovo laptop B570 bios password with SNWB06263888 AND PN59332473

author

Please help for Dell Latitude E6440 laptop

Service tag #: 3K49F12-6FF1

What is the master bypass passkey?

author
lords2112 (author)Riff Flanger2016-10-03

still waiting for mine sir..)

author

Hey dude, DELL latitude E6330
Seevice tag DY8FVY1

author

Hey, there should be a four character suffix after the service code eg: DY8FVY1-????

author

Sorry man, it's DY8FVY1-1D3B

author

Hi sorry, it's 1D3B. Thanks again. :)

author
UgochukwuN (author)Riff Flanger2016-10-01

its a dell latitude e6510

author
UgochukwuN (author)Riff Flanger2016-10-01

hello sir, i do need your help with a master bypass passkey for dell bios.

53S7SM1-1F5A

author

Please? :)

author
NBTech007 (author)Riff Flanger2016-09-22

Hey man Dell Latitude E6410

Service Tag - 3QMYQM1-1F5A

Can you get the master?

author
Riff Flanger (author)NBTech0072016-09-22

yeps, sure can; be cool if you learned please but thank you will do for now :-\

*************************************************************

Dell Service Tag: 3QMYQM1-1F5A

=

D3DYkfB9Jj0U2dqT

NB:Enter the 16chars carefully and then hold left CTRL key while pressing ENTER.

Buy the key.gen & C source code? conversenonstars@gmail.com

*************************************************************

author
AngelaS173 (author)2016-12-16

Hi I have purchased a used Del 6330 tag B38C4X1 it has the Bios locked can you please help me with the master password Thank you in advanced

author
Mystic8v (author)2016-11-21

Hi Im new to the forum but have a lenovo thinkpad x60 replaced the CMOS battery now wants a supervisor password to enter bios as I need to reset the date and time, I don't know the password and got the laptop second hand a few years ago ..,.arrrhhh....please help

author
RaymondB61 (author)2016-11-14

hi I have a Lenovo H5500s Model number R39x24423801. I need the bios password in order to get it back open.. help me!!!!

author
slaine_mcroth (author)2016-11-12

Hi all,

Could you help me ? I'm using a dell M6700 (a second hand computer...) service tag 71DTWW1-1D3B. Need bios password in order to update it.

BR
Slaine

author
BrettMerritt68 (author)2016-10-31

Help required please. A tech played with my laptop. Now stuck on BIOS Password screen:

Password =

Is a Toshiba Qosmio G50, Model PQG55A-04J01Y

Thanks in advance

author
UIT_GHOST (author)2016-10-29

Please help for Dell XPS 13 9350: 9Q3BP72-6FF1

author
JavierC141 (author)2016-10-15

Hello!

What about a Fujitsu lifebook e734?

#0270-0516-4162-7160-4032-8371

Will contribute, I'm in a hurry and the laptop is 2nd hand...

Thanks!!!

author
EntangledLoops (author)2016-05-04

ASUS laptops post-2002:

Set date/time to 1/2/2002. When prompted for password, press alt+r. You are asked for the "recovery password". All ASUS laptops, password is: ALAA4ABA. Will remove all BIOS passwords, including harddrive encryption master passoword. So much for hardware security.

author
JimS280 (author)EntangledLoops2016-10-12

Hi I am sorry to bother you sir. What if I cant change the date on my asus laptop without bypassing a bios startup password?

author
reds104 (author)2016-10-11

Hi, i'm a newby here.

I have a toshiba portege m400 need the bypass password badly, as it's cracking me up

cant do anything without bios password

ANYTHING out there ??????

author
DonselfL (author)2016-10-07

Please help for Lenovo laptop B570 bios password with SNWB06263888 AND PN59332473

author
nabeelib (author)2016-10-03

dear sir please help

my laptop has been locked and didnt got the password

service code #9J1W4Q1-6FF1

20161003_204505.jpg
author
lords2112 (author)2016-10-02

Hello Sir,
May I please Get the Master For My
Dell Latitude E6410ATG
8S98WM1-1F5A
Thanks in advance!
Lords

author
davek1976 (author)2016-09-29

hi i have a toshiba satellite pro r50-b-12n i came home to find my 5 year old sone playing about on my laptop and now i have a supervisor password with no idea what it is i really what to install windows 7 but i cant change the boot options can some one please help me thank you

author
sandyjos (author)2016-09-26

i forget bios password of toshiba satellite c850-b56,i had reset the battery jumper but again same problem apper, what can i do , please help me

author
sandyjos (author)2016-09-25

i forget bios password of toshiba satellite c850-b56,i had reset the battery jumper but again same problem apper, what can i do , please help me