Simple Methods to Clear or Remove BIOS Password

In this article will show you five methods to clear or remove BIOS password. There are two kinds of BIOS password, such as user password and system password. The user password is needed when you want to reset BIOS settings; but the system password is needed before it is self test. Below this article we mainly discuss how to clear or remove user password.

1. Clear BIOS password directory by cutting off the power

Step 1: Open the PC case, find out the CMOS battery.

Step 2: Take out the CMOS battery or cut down the battery button for a minute or an hour long that depends on your PC.

 

2. Clear BIOS password with Debug Command

You also can change or clear the CMOS settings to the default setting through the 70H or 71H port.

Step 1: Get into the MS-DOS setting, type in the command:

C:\dos> debug

-o 70 21

-o 71 20

-q

Or type in:

C:\dos>debug

-o 70 10

-o 70 01

-q

Step 2: After type in the command, restart computer, and you will find the user password is cleared.

Note:

The “-” symbol is appeared by default on the system, you do not need to type in.

 

3. Find out BIOS password with software

BiosPwds can help you to find out the BIOS password easily and quickly.

Step 1: Launch BiosPwds, press the [Get Passwords] button.

Step 2: In a few seconds you will find the BIOS version, BIOS date, BIOS password is displayed on the BiosPwds screen.

 

4. Remove BIOS password with a cracker

Step 1: Type in the program code:

Color 10,5

DIM A(9)

CLS

PRINT SPACE$(980); TAB(22); “THE PASSWORD FOR ZHE BIOS IS:”;

OUT&H70,28

P=INP(&H71)

OUT&H70,29

Q=INP(&H71)

X=16^2*Q+P

Color 30,5

I=0:J=0:N=0

Y=X+I*65535

Z=INT(3*Y/(4^(N+1)-1))

IF Z

Step 2: After type in the code, press F6, and the press Enter to run the cmos.com file.

Step 3: When the computer restarted, you will find the BIOS password is removed.

5. Reset BIOS password by changing the hardware settings

Step 1: Open the pc case, change the hardware settings, for example, take out the sound card or disconnect the floppy drive data line.

Step 2: Restart computer, when get into the Setup program, reset the CMOS password.

Step 3: Press F10 to save the change, and then restart computer.

 

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