How to crack the login password To solve the problem of forgetting the password

The login password is a must in many computers. I believe you have set one yourself, but there are some drawbacks. If you are a very easy to forget person during the use of Windows XP, then don't forget to create a boot disk that can restore the password of the account in Windows XP while setting the password for the first time. It can save you the format. The trouble of the hard disk.

Find the "User Account" item from the "Control Panel" and select your account to enter the control interface as shown in the figure. We can see that there is an item in the task list on the left side. A forgotten password & rdquo;, click to open “ Forgot Password Wizard & rdquo;, the wizard will prompt to insert a formatted blank disk, the operation will let you enter the password used by the account, very soon You can create a password reset disk.

Later, when we have forgotten the account password, after logging in to windows xp without using the “Welcome Screen” login method, press “Ctrl + Alt + Del” In the “Windows Security” window, click the “Change Password” button in the option and the Change Password window appears. In this window, backup the current user's password, click the “Backup” button in the lower left corner, activate “Forgot Password Wizard”, and follow the prompts to create a password reset disk.

If you enter the wrong password in the Windows XP login window, the "Login Failure" window will pop up. If you really can't remember what your password is, click “Reset&rdquo ; button, start the password reset wizard, through the password reset disk just created, you can use this password to reset the password and start the system. Reset your password and log in to windows xp.

 The creation of the password reset disk" is dangerous because anyone can use this "password reset disk" to log in to windows xp, you can use this user The name enters the user account and operates everything that the real user can operate, so you must keep the “password reset disk” in the appropriate place to prevent loss or loss of confidentiality.

Method 1——Using “administrator” (This method applies to administrators whose username is not “administrator”)

We know that during the installation of Windows XP, the first is Log in as default by “administrator”, then ask to create a new account, use this new account to log in when entering Windows XP, and only the created user account will appear in the windows xp login interface, and will not appear. Administrator”, but in fact the "administrator" account still exists, and the password is empty.

After we understand this, if you forget the login password, on the login screen, hold down the Ctrl+Alt key and then press the Del key twice to display the classic login screen. At the user name, type “administrator”, the password is empty, and then modify the password of “zhangbp”.

Method 2——Delete SAM file (note that this method only works with WIN2000)

Windows NT/2000/XP uses a secure account manager for secure management of user accounts ( The security account manager (SAM) mechanism, the security account manager manages the account through the security identity, the security identity is created at the same time when the account is created, and once the account is deleted, the security identity is also deleted. The security identity is unique, and even with the same username, the security identity obtained each time it is created is completely different. Therefore, once an account is rebuilt by a username, it will be given a different security ID and will not retain the original permissions. The specific performance of the security account manager is the %SystemRoot%system32configsam file. The SAM file is the user account database of Windows NT/2000/XP. All users' login names and passwords are saved in this file.

Knowing this, our solution has also been created: delete the SAM file, start the system, it will rebuild a clean and innocent SAM, which naturally has no password.

However, such a simple method is not applicable in XP, Microsoft may use this as a BUG, ​​made a restriction … … so now under XP system, even if you delete the SAM, you can not delete the password On the contrary, it will cause the system to start initialization error, and thus enter the infinite loop and can not enter the system!!

Method 3—— Find the password from the SAM file (premise …… will use DOS basic commands)< Br>

Before the system starts, insert the boot disk and go to: C:WINNTSystem3Config Use the COPY command to copy the SAM file to the floppy disk. Get another machine to read. The tool needed here is LC4, run LC4, open and create a new task, and then click “IMPORT→Import from SAM file” to open the SAM file to be cracked. At this time, LC4 will automatically analyze this file and display the file. Username in the middle; then click “Session→Begin Audit”, you can start cracking the password. If the password is not very complicated, the result will be obtained in a short time.

However, if the password is more complicated, it will take a long time, then we need to use the following method.

Method 4——Overwrite with other SAM files (provided you can get the SAM file of another computer and its password …… personally think it is the most feasible way)