Setting the power-on password is a kind of protection for the computer, but our life is more and more technological, and the home is also equipped with a computer, but the elderly at home often want to use the computer, but we can’t remember what we have set up. Passwords are very inconvenient for them to use, so today to teach you how to cancel the power-on password: The first method is that you only use this simple method to set up "start" & rdquo; → & ldquo; run & rdquo ;, and enter: Control userpasswords2 Click “ OK & rdquo;, the “ User Accounts & rdquo; dialog box appears. Cancel here & ldquo; To use this machine, the user must enter the username and password before the hook. After clicking “OK", a new dialog box will appear asking you to set which user to log in automatically. Enter the user name and password of the automatically logged in user here. If you are using a password set by another method, then canceling the password is also very troublesome. See which password you set up with which program! ! In the start menu, enter control userpasswords2, and then remove "to use this machine, the user must enter the account and password" and then click the application (note that the application is not OK), then there will be a file for you to enter automatically In the account window, enter the account you want to automatically log in to the account, the password is not empty, you must find the password to clear the login password, manual system may be bad, the specific methods are as follows: 1 Use the command to delete the password and restart WinXP first. At the moment after the startup screen appears, press F8 and select “Safe Mode with Command Line” to run. After the startup process is completed, the system will list the administrator user Administrator and the general user (“ such as abc”) selection menu, select the administrator user Administrator, enter the command line mode and type the command: <quo;net user abc 1234 /add&rdquo ;,note! In the command you type, the word "abc" is the username you have used before, and the word "1234" is the user password. The purpose of the order is to forcibly change the login password of the user to “1234”. If you want to add a user here (for example, the user name is 321 and the password is 4321), you should type "<quo;net user 321 4321 /add"; after adding, you can use the "net localgroup administrator 321 /add” command to Promoted to the system management group administrator user with super permissions. Then restart WinXP, select the normal mode to run, you can log in to the abc user with the changed password “1234” This method is only applicable to WinXP installed with FAT32 partition and the user account is not a Chinese character name. 2. Delete WinXP through dual system If there are other operating systems besides WinXP, you can use another operating system to start, and then delete the current SAM file on C:windowssystem32config (if WinXP is installed on C drive, it can be deleted according to the actual situation). That is, the account password data file. Then restart WinXP, then the administrator administrator account has no password. Of course, if there is only one WinXP system, you can also remove the hard disk and switch to other machines to delete the SAM file. This method is suitable for WinXP installed with FAT32 partition. If you install with NTFS partition, you must ensure that other systems can access NTFS partition. 3. Using the NTFS partition installation solution Use a tool called NTFSDOS to create a bootable disk that can operate NTFS partitions from DOS. After booting DOS, switch to the system. If C:Windowssystem32, rename logon.scr to logon.scr.bak, copy a command.com and rename the file name to logon.scr, then wait 15 minutes after restarting the machine. The screen saver that should appear now becomes the command line mode, and it has the administrator permission, through which you can change the password or add a new administrator account. After entering WinXP, change the name of the logon.scr.bak screen saver back. This method is suitable for WinXP installation on NTFS partitions. 4. Use other tools to rebuild WinXP login password. You can find many WinXP login password tools on the Internet. For example, you can use the Linux boot disks to access the NTFS file system, and you can read the registry and rewrite the account password. You can use the NTAcess tool. Bypassing the protection of the system syskey, reset the passwords of WinNT/2000 and WinXP; there are tools such as passware kit, O&O Bluecon2000 and so on.