9 repair tips for forgetting passwords in Windows system (1)

Using Windows If you are a very easy to forget person, then don't forget to create a password that can restore the account in Windows XP at the same time you set the password for the first time. The boot disk, which allows you to avoid the hassle of formatting the hard disk.

When we have forgotten the account password, log in to Windows XP without using the "Welcome Screen" login method, press "Ctrl + Alt + Del", the "Windows Security" window appears, click In the option "Change Password" button, the Change Password window appears. In this window, backup the current user's password, click the "Backup" button in the lower left corner, activate the "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, you can click the "Reset" button to 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 "password reset disk" is dangerous because anyone can use this "password reset disk" to log in to Windows XP, and they can enter the user in the name of the user. Account, operate everything that real users can do, so you must keep the "password reset disk" in the appropriate place to prevent loss or loss of confidentiality. Here are some other related methods.

◆Method 1 - Use "administrator" (this method applies to the case where the administrator user name is not "administrator")

We know that in the process of installing Windows XP, the first is " The administrator" logins by default, and then asks to create a new account to log in to Windows XP with this new account, and only the created user account will appear in the Windows XP login interface, "administrator" will not appear, 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. When you type "administrator" in the username, the password is blank, and then the password of "zhangbp" can be modified.

◆Method 2 - Delete SAM file (Note that this method is only applicable to WIN2000)

Security management for user accounts in Windows NT/2000/XP uses a secure account manager ( 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 Windows NT/2000/XP user account Database
, and all user 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, there is no password.

However, such a simple method is not applicable in XP, Microsoft may have made restrictions as a BUG... So now under XP system, even if you delete the SAM, you can't delete the password, instead Will cause the system to start initialization error, and thus enter the endless loop and can not enter the system! !

◆Method 3 - Find the password from the SAM file (premise... it will use the DOS basic command)

Before the system starts, insert the boot disk and enter: C:WINNTSystem3Config with COPY The command copies the SAM file to a 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 it in the file. Username; then click "Session→Begin Audit" to 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.

[In fact, you can borrow another computer to write a.bat and scripts.ini with "Notepad", and then copy it to your computer via DOS using U disk]

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The above script uses the FAT32 file system. If you use the NTFS file system, you can mount this hard disk from disk mode to other computers that recognize NTFS file systems (such as Windows 2000 or Windows XP). Do the above. This method can restore the password of the administrator (Administrator). Password recovery for local computer users and domain users in Windows 2000 systems is also valid.

Office NT PASSWord & REGISTRY EDITOR. This software can be used to make a Linux boot disk. This boot disk can access the NTFS file system, so it can support Windows 2000/XP well. Using one of the floppy disks, NTPASSWD, which runs under Linux, solves the problem and can read the registry and rewrite the account. The method of use is very simple, just follow the prompts after startup to do it step by step. Here, it is recommended that you use the quick mode, which will list the user for you to choose to modify that user password. By default, the ADMIN group user is selected, and it is very convenient to automatically find the user who has replaced the name of the ADMINISTRATOR.