Win Password problem

First, the power-on password

power-on password, that is, the CMOS password, 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 method of cracking is different.

1.Setup Password

If the computer can boot properly, just can't enter the BIOS setup (that is, set the setup password), then we forget the password only in DOS to start Debug, and then enter 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.

2.System Password

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. The only way to do this is to open the chassis, give the CMOS discharge, clear all the content in the CMOS (including the password, of course), and then reboot to set up. In addition, some motherboards have the CMOS password removal jumper set up and the jumper can be shortened to the same purpose (see the motherboard specification for details).

Second, the Windows operating system password

1.Windows Startup Password

The forgotten Windows startup password does not affect the startup of the system, but it will cause users to be unable to access their personal settings, so it is also necessary to crack the Windows startup password to retrieve the "lost" personality. To do this, we can delete the * from the Windows installation directory. PWL password files and all the personal information files in the Profiles subdirectory, and then restart Windows, the system will pop up a password without any user name box, we do not need to enter any content, directly click the "OK" button, the Windows password is deleted. Also, run "Regedit.exe", open the Registry database "HKEY_LOCAL_MACHINE" → "Network" → "userprofiles" under the "Logon" branch to "0", You can then restart Windows to achieve the same goal.

2. Power Management Password

The power management function of Windows can also set a password, after setting this function, the system will require the password to be entered when returning from the energy-saving state, so as to realize the purpose of protecting the system to some extent. However, since the password for the Power management feature is exactly the same as the Windows startup password, the Power management password will be compromised by simply breaking the Windows startup password in the previous way.

From the above introduction, you can see that Windows Password protection is not perfect, whether the power-on password or screen protection, power management password is very fragile, we must be supplemented by other control measures to prevent others to invade the purpose.