Friday, August 24, 2012

BIOS Password Removal


Some Users forget BIOS password or some may purchase computer from a friend and he is out of country, here are some steps to reset password.
Reset BIOS password using Hardware(two methods)
a) Reset BIOS password removing CMOS battery
b) Reset BIOS password using Jumper
Reset BIOS password using DOS
Reset BIOS password using Software
Reset BIOS password using Backdoor BIOS Password

Reset BIOS password using Hardware

Two methods: first is by removing CMOS battery, second by jumper in motherboard. Many of the desktop computers motherboard has a small coin sized CMOS battery. They store password and other settings. Once CMOS battery is removed the entire password and settings are lost and they are reset to factory defaults.

Reset BIOS password removing CMOS battery

Step 1 power off your computer and unplug power cable.
Step 2 open computer cover.
Step 3 locate coin sized battery.
Step 4 using flat screw driver push the battery lock to lift battery.
Step 5 remove battery and wait for half an hour to discharge.
Step 6 fix back battery, computer cover and power cable and power on computer.
Step 7 you will get CMOS checksum error and the settings will be restored to factory defaults.
Step 8 go to ths BIOS setup program by pressing F2 or delete or as per brand it varies and save settings . now your computer is without password.

Reset BIOS password using Jumper

Some desktop computers come with CMOS battery soldered to its motherboard. Use the jumper to clear settings.

Step 1 power off your computer and unplug power cable.
Step 2 locate the jumper as labeled as CLR, CLEAR, CLEAR CMOS, etc shown in the figure above. The location varies from computer to computer brands.
Step 3 there will be either 3 or 2 pins, if it is 2 pins insert the jumper in those 2 pins, if it has 3 pins remove the jumper and join the center pin to the opposite pin. If the jumper joins center pin to left pin, then remove it and join center pin to right pin or vice versa.
Step 4 wait for few seconds and re fix the jumper to its original position
Step 5 you will get CMOS checksum error and the settings will be restored to factory defaults.
Step 6 go to ths BIOS setup program by pressing F2 or delete or as per brand it varies and save settings . now your computer is without password.

Reset BIOS password using DOS

Step 1 create a DOS system disk.
Step 2 copy “debug” command from DOS or windows directory to the system disk.
Step 3 boot the computer from the system disk
Step 4 at command prompt type debug and enter you will see a “-“ blinking.
Step 5 type o 70 2E and enter
Step 6 type o 71 FF and enter
Step 7 type q and enter
Step 8 remove the system disk and reboot the computer, unplug power cable and re plug it, power ON your computer and settings reset.

The character “ o “ in the above commands is English alphabet "o" and not the number 0, it outputs the value to IO ports, The number 70 and 71 are port numbers which are used to access CMOS memory. FF - tells CMOS that there is an invalid checksum and it resets the CMOS settings as well as BIOS password.

Reset BIOS password using Software

CmosPWD application that can be used to retrieve and decrypt the BIOS password. It also provides backup, restoral, and erasing capabilities.

Works with the following BIOS * ACER/IBM BIOS * AMI BIOS * AMI WinBIOS 2.5 * Award 4.5x/4.6x/6.0 * Compaq (1992) * Compaq (New version) * IBM (PS/2, Activa, Thinkpad) * Packard Bell * Phoenix 1.00.09.AC0 (1994), a486 1.03, 1.04, 1.10 A03, 4.05 rev 1.02.943, 4.06 rev 1.13.1107 * Phoenix 4 release 6 (User) * Gateway Solo - Phoenix 4.0 release 6 * Toshiba * Zenith AMI

Step 1 Download http://www.cgsecurity.org/cmospwd-5.0.zip & extract to a folder. Extract to a folder “ cmos “.
Step 2 To work on CMOS memory, ioperm need to be installed and running. ioperm gives direct port I/O access for specified ports to user-mode process (ring 3) using Ke386SetIoAccessMap and Ke386IoSetAccessProcess kernel functions.
Step 3 Log on to Windows as Administrator.
Step 4 Run command prompt
Step 5 go to the directory d:\cmos\windows by using command “ cd\” then go to “d:” where the cmos directory is present. Then type cd cmos then press enter key then type cd windows and press enter key
Step 6 when you are in d:\cmos\windows then type “ioperm.exe –i” hit enter.
Step 7 to start ioperm service type “net start ioperm” hit enter.
Step 8 type “Cmospwd_win.exe /k” hit enter , the below commands will appear in the prompt 1 - Kill cmos 2 - Kill cmos (try to keep date and time) 0 - Abort Choice :
Step 9 Type 1 and hit Enter to clear cmos.


now the password is reset and you will have to insert a new password and save it.

Reset BIOS password using Backdoor BIOS Password

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

AMI BIOS Backdoor Passwords:

AMI
BIOS
PASSWORD
HEWITT RAND
AMI?SW
AMI_SW
LKWPETER
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

No comments:

Post a Comment