The method of eliminating CMOS password in computer company Win7 system by using DOS command

The specific steps are as follows:

1, in DOS for everyone to provide an editor, that is, debug, this is a very practical tool, the specific boot method is: At the DOS command prompt state input command: DEBUG, and then enter the debug editing interface.

2, in the command state after entering the following command, restart the computer to clear the CMOS password, the following gives five clear the CMOS password command line.

Method One

-O 70 10

-O 71 10

-Q

Method Two

-O 70 23

-O 71 34

-Q

Method Three

-O 70 16

-O 71 16

-Q

Method Four

O 70 10

-O-FF

-Q

Method Five

-O 70 11

-O-FF

-Q

3, in the method of the five methods are used in 70 and 712 digits, this is because the data access in the CMOS is through 70 and 71 of the two I/O port to achieve, port 70H is a byte address port, used to set the data in the CMOS address, The port 71H is used to read and write the contents of the data unit in the CMOS address of the port 70H set.