clear cmos password

Set CMOS password is considered one of the very effective measures to computer security. CMOS password breaking is a very difficult but not impossible. But for the successful implementation also requires you to have a "skilled" certain.

There are several ways to break the CMOS password, such as replacement BIOS chip, BIOS chip circuit, use jumper, remove the battery on the motherboard, breaking the CMOS password with a number of commands, enter the default password of the manufacturer ... but for world computing "ordinary academic" as the appliance we have two methods that can apply to be temporary.


1. Enter the password of BIOS standard by the manufacturer was available by default.

- For BIOS type Award, we can enter the default password to try to unlock the password previously set: AWARD SW, AWARD_SW, Award SW, AWARD PW, _award, awkward, J64, j256, j262, j332, j322, 01322222, 589589, 589721, 595595, 598598, HLT, SER, SKY_FOX, Ally, Ally, Condo, concat, TTPTHA, aPAf, HLT, KDD, ZBAAACA, ZAAADA, ZJAAADC, djonet.

- For the user types Ami BIOS: AMI, AMI, AMI SW, AMI_SW, BIOS, PASSWORD, Hewitt RAND, Oder.

- Some common password for Ami, Award BIOS, and some others can try as LKWPETER, lkwpeter, Biostar, Biostar, BIOSSTAR, biosstar, ALFAROME, Syxz, Wodj.

But in fact this method is not very effective because of foreign brands Award, Ami ... are also dozens of other brands that virtually BIOS can not know the default password is.

2. CMOS password breaking with specialized software or command in DOS environment:

If you are allowed to use a computer being installed CMOS password, you can use DEBUG to run some commands in the DOS environment to break the password. These are the commands that can void the BIOS memory, making it back to the original state, ie before the installation password. But actually it is very difficult because it is not always possible in the DEBUG environment.

3. Remove the battery would completely remove the motherboard to BIOS memory.

This is manipulation impact on hardware to completely erase the BIOS memory is considered the most effective, if the "liver" is a little anyone can do.

At first you must remove the chassis -> Look carefully on board computer to find the batteries have a diameter the same as a coin 200 is mounted in a circular cell batteries fit. Find these batteries is actually not hard -> Observe carefully and remove the batteries out by clicking on the "jumper" as illustrated -> Take the battery out and wait about 30 minutes for "sure", ie ensure that all data stored in the BIOS will "evaporate" off -> then attached to the right as illustrated. When you restart the computer, the BIOS will automatically return everything exactly as the original default password and of course will disappear.

Ensure that most cases are successfully remove the battery and if you add batteries to remain in that password, you have to remove it and wait time "evaporate" much longer, maybe even days.