How to clear the CMOS password

"CMOS password" is commonly referred to as "power-on password", mainly to prevent others to use their own computer, set a barrier.

"CMOS password" to crack a lot of ways, mainly in the following several:

First, change the hardware configuration

When the CMOS password is lost, you can try to change the hardware of the machine before restarting, because if the system discovers that the new hardware configuration is different from the original hardware configuration, it may allow you to go directly to the CMOS reset without needing a password. The way to change your hardware configuration is simple: Unplug a single piece of memory or install a different type of CPU (of course, motherboard support), replace a hard drive, and so on.

Second, the establishment of their own password to crack the file

A. When the system self-test completes, when ready to boot windows, press the F8 key, select "Safe mode Command Prompt Only" (Security command mode) after entering copy CON yk.com at the DOS prompt, enter in the editing environment after the carriage return:

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+117, alt+241, alt+195 and then save by F6. Note that when you enter the above data, you first press the ALT key, then press the numeric keypad (press the number key on the keyboard that does not work) the number key, after the loss of a number of numbers and then release the ALT key, and then press the ALT key to enter the next number ... In the process, every time you release the ALT key screen will appear a random character, we do not care about it.

After the save exit, we run yk.com this file directly, the screen should not have any prompt 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.

B. When you select Secure Command mode at startup, you lose copy CON yk.com, and then enter in the editing environment:

alt+176, Alt+17, alt+230, p, alt+176, alt+20, alt+230, Q, alt+205, after the space after the F6 save run this file, restart the computer.

Third, the Debug method

At the DOS prompt, when you run debug, enter:

-o70 18

-o71 18

-Q

Or

-o70 21

-o71 21

-Q

Restarting the computer after exiting to a DOS prompt clears the CMOS password completely. Please note that 70 and 71 are CMOS two ports, we can write to them arbitrary error data (such as 20, 16, 17, etc.), will destroy all the settings in the CMOS, the time friends may wish to use a few more data to try.