BIOS passwords are used to add some extra security to computers. You can either set a password to prevent access to BIOS settings or to prevent PC from booting. But sometimes this extra security might become a pain when you forget the BIOS password or someone changes your system BIOS password intentionally. But there is no need to worry. There are many known ways to reset / remove / bypass the password: By removing the CMOS battery By using the motherboard jumper By using MS DOS command By using software By using Backdoor BIOS password

Now I'll try to explain each method one by one: A. By Removing the CMOS Battery: Almost all motherboards use a small coin sized CMOS battery to store all BIOS settings along with the password. To reset the password, unplug the PC, open the cabinet and remove the CMOS battery for approx. 15-30 minutes and then put it back. It'll reset all BIOS settings as well as the password and you'll need to re-enter all settings. If it fails, then try to remove the battery for at least one hour.

B. By Using the Motherboard Jumper: In most motherboards CMOS battery is soldered, which makes it difficult to remove the battery. In this case we use another method. Almost all motherboards contain a jumper that can clear all CMOS settings along with the BIOS password. The location of this jumper varies depending upon the motherboard brand. You should read your motherboard manual to check its location. If you don't have the manual then look for the jumpers near the CMOS battery. Most of the manufacturer label the jumper as CLR, CLEAR, CLEAR CMOS, etc.

When you find the jumper, look carefully. There will be 3 pins and the jumper will be joining the center pin to either left or right pin. What you need to do, is remove the jumper and join the center pin to the opposite pin. e.g. if the jumper joins center pin to left pin, then remove it and join center pin to right pin. Now wait for a few seconds and then again remove the jumper and join the center pin to left pin. Make sure to turn the PC off before opening the cabinet and resetting the jumper.

C. By Using MS DOS Command: This method works only if you have access to the system when its turned on because this method requires MS DOS. Open MS DOS from programs menu and provide following commands one bye one: debug o 70 2E o 71 FF quit NOTE: The first character in the above commands is " O" and not the number 0.

After providing the above commands, restart your system and it should reset the CMOS Settings along with the BIOS password. If you are curious to know how it works? then let me explain the above commands: In this method we are using the Debug tool of MS DOS. The " O" character present at first in these commands, outputs the values to IO ports. The number 70 and 71 are port numbers which are used to access CMOS memory. By providing FF value we are telling CMOS that there is an invalid checksum and it resets the CMOS settings as well as BIOS password.

D. By Using Software: There are a few software which can also reset CMOS settings or BIOS password or both within a few clicks. But as stated above you should have access to a system which is turned on and should have access to MS DOS or MS Windows: KillCMOS !BIOS CmosPwd

E. By Using Backdoor BIOS Password: Some BIOS manufacturer put a backdoor password in BIOS which always works irrespective of what password you have set in BIOS. Its a master password which is used for testing and troubleshooting purposes.

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

AWARD BIOS Passwords: 01322222 589589 589721 595595 598598 ALFAROME ALLy aLLy aLLY ALLY aPAf _award 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

PHOENIX BIOS Passwords: BIOS CMOS phoenix PHOENIX

Misc Common Passwords: ALFAROME BIOSTAR biostar biosstar CMOS cmos LKWPETER lkwpeter setup SETUP Syxz Wodj

Other Manufacturer BIOS Passwords: Biostar - Biostar Compaq - Compaq Dell - Dell Enox - xo11nE Epox - central Freetech - Posterie IWill - iwill Jetway - spooml Packard Bell - bell9 QDI - QDI Siemens - SKY_FOX TMC - BIGO Toshiba - Toshiba VOBIS & IBM - merlin NOTE: All these passwords are case- sensitive and are changed from time to time by manufacturers.

I know the first way already -tnxs- for sharing, never knew there is other way

Not a good ide to tell people to work with byos... better NOT TO TOUCH IT!! but its up to u if u flash ur own byos lol

this answered my question in your previous topic about hacking password of any Operating System.. -good-

its nt 4 OS pwd hacking. . . . . . .

umm, what I mean is, by knowing how to bypass/remove CMOS, it is possible to log on Windows by using default administrator username.. Also in another thread (-_-||) which I assume CMOS password not that very safe.

9c info

Thnkx man simple bt effective