Bios Clear Password method

Sometimes, in order to ensure computer security, some friends like to set the computer BIOS password to prevent others to modify the motherboard CMOS settings. Because we generally rarely need to enter the BIOS settings, so over time, many friends easily forget the BIOS password, then the BIOS password forgot how to do? This is a recent netizen asked a small series of a problem, the following for you to share several BIOS password removal methods, encounter similar problems friends, may wish to try.

BIOS Password Erase How do I forget my BIOS password removal method

What if the BIOS password forgets?

1, if your computer can also enter the BIOS settings inside, just want to clear the BIOS password, it is very simple, the method is to enter the computer BIOS settings, and then select the "Load optimized Defaults" option, then will prompt you to restore the BIOS to the original settings, We choose OK (see the following prompts, press the keyboard on the Y-key, that is, OK), the following figure:

2, if we have no access to the BIOS operating interface, then what should we do?

There are many ways, the simplest way is to download some of the BIOS password removal tool on the internet to achieve, but different chip motherboard BIOS password Removal Tool is different, we might as well go to Baidu Search, find relevant tools to clear the BIOS password.

Related knowledge: What is the relationship between BIOS bios and CMOS

The following is a Pepsi network for your online collection of some of the methods, personal test, encountered such problems friends may wish to try.

The BIOS (basic Input output system), the basic input/output, is actually a set of programs that are solidified into a ROM chip on the computer's motherboard to provide the lowest-level, most direct hardware control for the computer. Unlike other programs, the BIOS is stored in the BIOS chip, not stored on the disk, because it is part of the motherboard, so people sometimes call it a different from the software is also different from the hardware name "firmware" (firmware), which is mainly used to store the Self Diagnostic test program ( Post programs, System bootstrap loader, System Setup program, and I/O drivers for primary I/O devices and interrupt service programs.

If you do not want others to use their own computer, you can set the BIOS password to the computer to add a "lock." What should I do if I forget my bios password? Don't worry, here are a few tips to help you.

Depending on the user settings, the boot password is generally divided into two different situations, one is the setup password (in this way, the system can be started directly, but only enter the BIOS settings required to enter the password); the other is the system password (in this way, Either direct or BIOS setup requires a password, no password will accomplish nothing. For the two passwords set by the user, our methods of cracking are different:

First, crack the setup password

If the computer can boot properly, but cannot enter the BIOS setup (that is, the setup password is set), then we have the following options:

Method One: Dubug method

After you forget your password, just start debug in DOS, and then type the following command to manually clear the password:

_ O 70 16

_ O 71 16

_ Q

In addition, users who are unfamiliar with debug can also download a tool software cmospwd that specifically cracked the CMOS password. The program is then launched in DOS, and it will display the user's CMOS password (CMOSPWD supports Acer, AMI, award, COMPAQ, DELL, IBM, PACKARD BELL, PHOENIX, ZENITH ami, and many other bios). Very convenient to use.

Method Two: Software cracked

Now have a lot of detection system or power-on password software, the most common have biospwds, cmospwd and so on. Biospwds is one of the most excellent one, you can detect the BIOS version, BIOS update date, Administrator password, CMOS password, password type, and so on, and the use of simple, click the window "Get Password" button to display all the information Biospwds detected.

But because the software cracked the password, is the BIOS encoded password reverse decoding, so sometimes may find the program's password and the real password is not the same, this is also a normal phenomenon, so this trick sometimes will not spirit.

Method Three: Oneself compiles the document to crack

Enter the MS-DOS environment and enter edit and carriage returns under the DOS prompt (if you find that you have not edit.com the file by clicking Edit, please see the next method) and enter:

ALT+179 ALT+55 ALT+136 ALT+216 ALT+230 ALT+112 ALT+176 ALT+32 ALT+230 ALT+113 ALT+254 ALT+195 ALT+128 ALT+251 ALT+64 ALT+1 alt+241 alt+195

Note: Enter the above data first press the ALT key, and then press the numeric keypad (press the keyboard above the row of the number key is not the role of the number key), after the loss of a number of digits and then release the ALT key, and then press the ALT key. During the operation, a random character appears on the screen and we don't have to worry about it. Then select "Save" under the "File" menu and save it as a cmos.com file, then exit to the MS-DOS environment, find cmos.com This file, see if he is 20 bytes, if it means you entered the wrong, you need to re-enter. After confirmation, directly run cmos.com, the screen should not have any hint information, and then restart the computer to clear the CMOS password, of course, the other CMOS settings will also be cleared, which requires us to reset.

Method Four: dos under the crack

This method can be done directly in MS-DOS and entered in MS-DOS: COPY CON CMOS. COM after return, continue to enter the following 10 characters: alt+176 alt+17 alt+230 p alt+176 alt+20 alt+230 Q alt+205 < space, and then press the "F6" key, and then press ENTER to save, After running the cmos.com file, reboot.

Without a password to start the computer at all (that is, the system password is set), we cannot solve the problem of password forgetting by software. At this point you can use the following methods:

The first trick: universal password

Each motherboard manufacturer has a common password set by the motherboard to facilitate technical support. If we know the general password of the motherboard, then whether the boot, or CMOS settings can be "through the wall" of course, do not use this to do bad things yo!

It is important to note that the motherboard manufacturers for some reason, different times the general password of the motherboard will be different, so this trick and can not pass the world, we only try a few times, whether it is useful depends on luck!

Award BIOS Common password: j256, Lkwppeter, Wantgirl, EBBB, Syxz, ALLy, AWARD©SW, AWARD_SW, j262, HLT, SER, Sky_fox, Biostar, Alfarome, Lkwpeter, 589721, Awkard, h996, CONCAT, 589589.

AWI BIOS Common password: AMI, bios, PASSWORD, HEWITT RAND, AMI_SW, Lkwpeter, A.M.I.

The second trick: CMOS discharge

Most of the current motherboards use button batteries to provide power to the BIOS, which means that if there is no electricity, the information inside it will be lost. When it is again on the power, the BIOS will return to the original state not set, of course, the BIOS password is not.

First we need to open the computer chassis to find the Silver button battery on the motherboard. Carefully remove it, and then the chassis rear power plug unplugged, with a metal plate short to the bottom of the battery to sit on the spring, about 30 seconds after the battery installed.

At this time CMOS will be lost due to the loss of internal storage information, ok! it back, close the chassis, the system will be prompted "CMOS Checksum error-defaults Loaded", that is to prompt you "CMOS detected errors in the check, has been loaded in the system defaults." The BIOS password cracked successfully.

The third recruit: jumper short connection

If the motherboard of the CMOS chip and battery integrated in a piece, or the battery is directly welded to die in the motherboard, there is the second we use the "CMOS discharge method", the results did not work, then we will use jumper short to take this trick.

After opening the chassis, there will be a jumper switch near the motherboard CMOS battery, with reset CMOS (reset CMOS), clean CMOS (clear CMOS), CMOS close (CMOS off), or CMOS RAM reset next to the jumper ( CMOS memory reset), and so on, with the jumper cap short, and then jump back on the line!

Because the different motherboard jumper settings are not the same, so in the use of this trick, it is best to first consult the motherboard instructions. Forget to say one thing, when the CMOS discharge or clear the data in the CMOS, do not in the case of system boot, it is recommended to cut off the computer power.