How to quickly restore XP system Administrator password

Tip 1: Remove the SAM file to recover the password

As you know, the Windows xp password is stored in the SAM file under the windowssystem32config of the system, and the SAM file is the account password database file. When we log in to the system, the system will automatically proofread with the Sam in Config, and when the password and username are found to match the encrypted data in the SAM file, you will be able to log in smoothly, and you cannot log in if you are wrong. That being the case, we can recover the password by deleting the Sam file.

The specific performance of the security Account Manager is the%systemroot%system32configsam file. The SAM file is a Windows NT/2000/XP user account database, and the relevant information department for all users ' logins and passwords will be stored in this file.

Tip 2: Use tool software to recover passwords

Use Off1ine NT password&registry Editor. Use this tool software to make a Linux boot disk that can access the NTFS file system, so it can support Windows 2000/xp well. Using one of the floppy ntpasswd tools to solve the problem, you can read the registry and rewrite your account password. The method you use is simple, just follow the prompts you have started and do it step by step. Here, it is recommended that you use the quick mode, which lists the user's password for the user you choose to modify. The default choice of users of the Admin group, automatically find the name of the administrator to replace the user, very convenient.

Tip 3: Use NTFS dos to recover passwords

Using NTFS dos to write an NTFS partition from DOS, use the tool software to make a DOS boot disk, then rename the screen saver Logon.scr under C:windowssystem32, and then copy Command.com to C: Windowssystem32, and rename the file to Logon.scr. After you start the machine for 5 minutes, the screen saver that should appear is now in command line mode, and with administrator privileges, you can change the password or add a new administrator account. Do not forget to change the name of the screen saver after you change it.

Tip: The Security Account Manager (security Accountmanager,sam) mechanism is used in Windows nt/2000/xp for user account safety management, and the security Account Manager manages the account by security ID, The security ID is created at the same time as the account is created, and once the account is deleted, the security ID is also deleted. Security IDs are unique, and even the same user name, Windows XP obtains a completely different security identity each time it is created. Therefore, once an account has been deleted, its security identity no longer exists, that is, the use of the same user name to rebuild the account, will also be given a different security identity, will not retain the original permissions.