How to remove or bypass BIOS password

A BIOS password is a protection measure that can be used to stop someone powering up a computer system or making changes in some of the computers 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 to change anything to damage the computer which the manufacturer may have the warranty on it. However, when the computer technicians need to make some hardware changes to the computer, they will need to access the BIOS. Here are two methods to deal with BIOS password lost problem.

NOTE:

Do not try to guess the password on a passworded Hard Drive because 3 wrong guesses may 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 easiest 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 small battery inside the computer called a CMOS battery. If you take out the battery, your computer will lose its hardware settings, including its BIOS password. This should not be performed on Laptops if you are not experienced working with laptop hardware. For removing the battery, please do the following

1. Open up the computer case using a screw driver and locate the flat, circular and metallic CMOS battery.

2. Once you have located it, observe how the latches are holding it and try to remove it.

3. After making sure to the power of your computer is down, unplug the power cables and any USB devices if they are connected to power. Pull out the CMOS battery and wait for about 10 to 25 minutes before putting it back in because the computer may still have power in its capacitors even if everything is unplugged. The waiting period will discharge the power in capacitors.

4. Restore everything you have just done and power up the computer and enter the BIOS again. If everything is ok, there should be no more password. In some cases, if you get 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 does not work, try the following:

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

On many computers, especially old ones, computer manufacturers keep backdoor passwords for their own technicians to use so they can access the BIOS when they are asked to fix this problem. The following are some of them that have been reported. You may need to try quite a few passwords before you find one that works.

Note: the following passwords are Case sensitive.

1. AMI BIOS Backdoor Passwords:

A.M.I. 
AAAMMMII 
AMI 
AMI?SW 
AMI_SW 
BIOS 
CONDO 
HEWITT RAND 
LKWPETER 
MI 
Oder 
PASSWORD

2. 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

3. Phoenix Backdoor BIOS Passwords:

BIOS 
CMOS 
phoenix 
PHOENIX

4. Other Manufcaturers 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