Finding the CMOS Battery

How to Bypass or Remove a BIOS Password

  A BIOS password is a protection measure that can be used to stop someone from powering up a computer system or making changes in some of the computer’s most sensitive areas. Many big-name computer manufacturers such as Dell and HP lock the customers out of this area because they don’t want the customer changing anything and potentially damaging the machine (which the manufacturer may have to warranty). However, when someone like a computer technician or hardware enthusiast needs to make some hardware changes to the computer, they will need to access the BIOS. Here are some methods to be a bios password cracker, removing a BIOS password.

  NOTE: Do not try to guess the password on a passworded Hard Drive. 3 wrong guesses will often result in the information on the hard drive being lost forever.

  How to Bypass or Remove a BIOS Password by Removing the CMOS Battery:

  The simplest way to remove a BIOS password is to simply remove the CMOS battery. A computer will remember its settings and keep the time even when it is turned off and unplugged because these parts are powered by a small battery inside the computer called a CMOS battery. If we pull out this battery, the computer will forget a lot of its hardware settings, including its BIOS password. This should not be performed on Laptops if you are not experienced working with laptop hardware.

  Finding the CMOS BatteryFinding the CMOS BatteryAnyway, open up the computer case using a screwdriver and locate the flat, circular and metallic CMOS battery. It should look something like the picture to the right. Some computers have this part standing upright.

  Once you have located it, observe how the latches are holding it. There are many different ways to remove a CMOS battery but the most common way on newer computers can be seen in the picture below.

  Removing the CMOS BatteryRemoving the CMOS Battery

  Make sure to power down the computer, unplug the power cables, and unplug any USB devices if they are powered. The computer must not be able to get power from anywhere for this to work. Take out the CMOS battery and wait 10 – 25 minutes before putting it back in. The reason for this wait is because the computer can still store power in its capacitors even though everything is unplugged. The waiting period allows enough time for them to discharge.

  Plug everything back in, power up the computer, and enter the BIOS again. If everything went well there should be no more passwords. In some cases, if you get weird error messages during bootup now, you will need to go to “Load BIOS Defaults” in BIOS and save the changes to fix them.

  If this method didn’t work, try one of the methods below.

  How to Bypass or Remove a BIOS Password using Software:

  !BIOS is a freeware utility that is designed to be a whole BIOS and security suite. It has the ability to decrypt the passwords used in some of the most common BIOS makes such as Award, Phoenix, American Megatrends, IMB, etc.

  It also has the ability to brute force the password (known as “blasters”). However, this method is dangerous and can result in some unexpected and unwanted results.

  Note: Because of this application’s password cracking abilities, some antivirus software may report it as a virus/trojan. This is a false positive.

  To start using !BIOS, reboot your computer, and take note of the BIOS type and version you are running. For example, If your motherboard uses Award BIOS you should look for the text “Award Medallion BIOS 6.0” or something similar.

  Download !BIOS and save it to your desktop. Then, open a DOS command windows by going to Start > Run and type: cmd

  Once you see a black screen in front of you, type: cd desktop

  You should now see something like C:Documents and SettingsYourUserNameDesktop>

  Now type the name of the file you just downloaded, if you haven’t changed the name just type in: bios320.exe

  !BIOS - Decrypting a BIOS Password!BIOS - Decrypting a BIOS Password

  Use the down arrow and choose “Crackers” and then press the right arrow. Using the up and down arrows, select the BIOS that the motherboard is using and press Enter.

  You should now see a menu asking what you want to crack, in most cases, it’s the Supervisor or System Passwords you want to crack, so press the 1 key on your keyboard. It will then show you another menu asking how you want it to be cracked. Option 1 is pretty good so try that first by pressing the 1 key on your keyboard. You should now have your BIOS password.

  Reboot the computer, enter the BIOS and try it out.

  How to Bypass or Remove a BIOS Password using the manufacturer backdoor password:

  On many computers (especially old ones), computer manufacturers build in backdoor passwords for their own technicians to use so they can access the BIOS when the hardware is being serviced.

  Here are some of the ones that have been reported. You may need to try quite a few passwords before you find one that works.

  These passwords are CaSe SeNsItIve.

  AMI BIOS Backdoor Passwords:

  A.M.I.

  AAAMMMII

  AMI

  AMI?SW

  AMI_SW

  BIOS

  CONDO

  HEWITT RAND

  LKWPETER

  MI

  Oder

  PASSWORD

  Award BIOS Backdoor Passwords:

  (eight spaces)

  01322222

  589589

  589721

  595595

  598598

  ALFAROME

  ALLY

  ALLy

  aLLY

  aLLy

  aPAf

  award

  AWARD PW

  AWARD SW

  AWARD?SW

  AWARD_PW

  AWARD_SW

  AWKWARD

  awkward

  IOSTAR

  CONCAT

  CONDO

  Condo

  condo

  d8on

  djonet

  HLT

  J256

  J262

  j262

  j322

  j332

  J64

  KDD

  LKWPETER

  Lkwpeter

  PINT

  pint

  SER

  SKY_FOXSYXZ

  SKY_FOX

  syxz

  SYXZ

  TTPTHA

  ZAAAADA

  ZAAADA

  ZBAAACA

  ZJAAADC

  Russian Award BIOS Passwords:

  %?òü ?p?á?a%

  %a?òü ?p?á?a%

  Phoenix Backdoor BIOS Passwords:

  BIOS

  CMOS

  phoenix

  PHOENIX

  Other Manufacturers Backdoor Passwords (manufacturer name – password):

  VOBIS and 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

  SOYO – SY_MB

  TMC – BIGO

  Toshiba – Toshiba

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