Who can tell me how to crack the password of XP system?

1. Start Windows XP. The moment after the startup screen appears, press F8 and select "Safe Mode with Command Line" to run.

2. When the running process stops, the system lists the selection menu of the super user administrator and the local user nwe. Click the mouse on administrator to enter the command line mode.

3. Type the command: "net user liangli 123456 to forcefully change the OWNER user's password to "123456". If you want to add a user here (for example: the user name is abcdef and the password is 123456) If so, please type "net user abcdef 123456 /add". After adding, you can use the "net localgroup administrators abcdef /add" command to promote the user to the system management group administrators user with super permissions.

4. Restart. For Windows XP, if you choose to run in normal mode, you can use the changed password "123456" to log in as the liangli user

Five ways to crack the Windows XP startup password un\

The most recent one for me. I found an article on the Internet about cracking the XP boot password. After trying it, I felt it was pretty good. I hereby post it to share with you:

Secret 1: As you know, the Windows XP password is stored in Winnt\System32 where the system is located. In the SAM file under \Config, the SAM file is the account password database file. When we log in to the system, the system will automatically check with the SAM in Config. If it is found that the password and user name are all the same as the encrypted data in the SAM file. If it matches, you will be able to log in successfully; if it is wrong, you will be unable to log in. In this case, our first method is: delete the SAM file to recover the password. p[Tx

If you don’t care about it. Any account contained in the system card and if there are two operating systems, you can use another operating system that can access NTFS to start the computer, or even if two systems are not installed, you can use other tools to access NTFS and then delete C:\ SAM file in the WINNT\system32\config directory and restart. At this time, the administrator account will not have a password. Of course, it is also a good idea to remove the hard disk and change it to another machine to delete the SAM file N

Tips: The security management of user accounts in Windows NT/2000/XP uses the mechanism of Security Account Manager (SAM). The security account manager manages accounts through security identifiers. Security identifiers It is created when the account is created. Once the account is deleted, the security identification is also deleted. The security identification is unique. Even if it is the same user name, the security identification obtained every time it is created is completely different. Once an account is deleted, its security identification no longer exists. Even if the account is rebuilt with the same username, it will be given a different security identification and the original permissions will not be retained. !

The specific manifestation of the security account manager is the SystemRoot\system32\config\sam file. The SAM file is the user account database of Windows NT/2000/XP. All user login names, passwords and other related information will be saved in this file. =, A-H-

Tip 2: Use Off1ine NT Password & Registry Editor.

You can use this software to create a Linux boot disk. This boot disk can access the NTFS file system, so it can well support Windows2000/XP. The problem can be solved by using Ntpasswd, a tool running on Linux from the floppy disk. And can read the registry and rewrite account passwords. The method of use is very simple, just follow the prompts after starting it step by step. Here, it is recommended that you use the quick mode, which will list users for you to choose which user's password to change. Users in the Admin group are selected by default, and the user whose name is replaced by Administrator is automatically found, which is very convenient. gx@!

Tip 3: Use Windows Key 5.0. This software is included in PasswareKit5.0 and is used to recover the system administrator's password. After running, it generates three files: txtsetup.oem.winkey.sys and winkey.inf. Each of the three files is only 50KB, short and concise. Put these 3 files into any floppy disk, then use the XP installation CD to start the computer. During the startup process, press the F6 key to let the system install third-party drivers. At this time, it is the best time for us to jump in. Putting the floppy disk will automatically jump to the WindowsKey interface. It will forcefully change the Administrator password to "12345", so why worry about it? Haha! When you restart, you will be asked to change your password again. G"

Tip 4: Use NTFS DOS, a tool that can write NTFS partitions from DOS. Use this software to make a DOS boot disk, and then go to C;\Winnt\System32 to copy the screen saver logo. Rename scr, then copy command.com to C:\Winnt\system32 (cmd.exe can be used in 2000), and rename the file to logon.scr. After starting the machine, wait for 5 minutes, and the screen saver that should appear now. It has become a command line mode and has Administrator permissions. You can change the password or add a new administrator account through it. Don’t forget to change the name of the screen saver back after changing it. Download address: http: /www.cgsecurity.org/index.html? Rb

Tip 5: Here is a more unique method. You can install XP on another partition. The hard disk partition format must be the same as the original one. The same, and please be careful not to install it in the same partition as the original XP! Before starting, be sure to back up the boot area MBR (Master Boot Record) in advance. There are many ways to back up the MBR, you can program it yourself, or use tool software , such as anti-virus software KV3000, etc. After installing it, log in with Administrator. Now you have absolute write permissions on the original XP. You can copy the original SAM and use lOphtcrack to get the original password. All files under XP's Winnt\System32\Config\ are overwritten into the C\Winnt\System32\Config directory (assuming the original XP is installed here), and then use KV3000 to restore the previously backed up master boot