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Selasa, 18 Januari 2011

how to break bios password

Have you ever been locked out of an old computer by a forgotten BIOS password? There’s no need to get frustrated. It is relatively easy to bypass this safeguard.Well, most people tend to ignore memorizing a BIOS password, and this ends up causing them more trouble.So what do you do when you forget your BIOS passwords? You try to crack it open using some physical computing skills or through the help of a software. Remember though that the process to breaking BIOS passwords for alaptop and a desktop PC varies, regardless of the operating system involved. Here is a short guide to break bios password for a laptop  after followed by a desktop PC.

Break BOS Password for Laptop:
When it comes to a new laptop, your in for a hard time if you forget the BIOS password,Remember that laptops can be trickier, especially if it’s a newer some laptops have security chips placed on the motherboard.If this happens, youcannot access the motherboard physically like thedesktop.You either have to physically remove the chip or contact the mfg for the “master” password. If you can boot up off of a cd or floppy try any of these methods:

Create a bootable media either of Win98SE or you can try anything else too but select the on that will allow you to boot MS-DOS, and boot of it.
    • When A:> prompt appears then type debug and press enter.
    • You will see a “-”.
    • Type o 70 2E “including the spaces” and press Enter.
    • Now type o 71 ff “including spaces” and press Enter.
    • After this type q and press Enter.

Break BIOS Password for Desktop:

In case of desktop PC erasing the CMOS memory will clear the password. In order to do, follow the steps given below:
how to break bios password:
    • Power off the computer and make sure that it is unplugged.
    • Open up your computer case. You need physical access to the motherboard to complete this procedure.
    • Search for the circular silver metallic object on your motherboard. This silver metallic object is the CMOS battery.
    • CAREFULLY remove the CMOS battery, avoid touching it with your fingers, and leave it out for about 700 seconds. This will flush the CMOS memory which stores the BIOS passwordand all other configuration.
    • Fix the battery in its place again and close your CPU case.
    • Now turn on your computer, your computer should warn you thatCMOS configuration could not be found.
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 Command Prompt from Programs menu and provide following commands one bye one:
o 70 2E
o 71 FF
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.
If still you are unable to crack the password, there are a number of softwares available that will help you out and will clear the BIOS password
I have found that BIOS/CMOS Password Recovery Tools are the most effective.: BIOS-CMOS PasswordRecovery Tool is program that works instantly to remove any lost or forgotten BIOS/CMOS password.
BIOS-CMOS Password Recovery Tool Service:

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