method One:
At power-on, press F8 to enter "secure with Command Prompt" mode input "NET user+ user name +123456/add" to force a user's password to "123456″
Method Two:
If the user forgot to login password can be resolved in the following ways
1. Press (f8) and select (safe Mode with Command when the computer starts Prompt)
2. After selecting (administrator), you will jump out of (command prompt) window.
3. Add a user with (net) command, example: Add a user named alanhkg888, the command syntax is as follows: Net user Alanhkg888/add
4. The power to elevate the new user to administrator, for example: increase the power of the user alanhkg888 just now, command syntax is as follows net localgroup administrators Alanhkg888/add
5. After completing the above steps and restarting the computer, a user alanhkg888 is added on the splash screen, and the alanhkg888 enters
6. After login (console)→(user account)→ Select the forgotten password, then select (Remove password) (wait out)
7. In the login screen select the original user can not require the password situation under the entry (because removed)
8. Delete the user just added, in (console)→(users account)→ Select (alanhkg888), then select (Remove the account) can not be used to forget the installation of the password set (administrator)
Method Three:
1, restart Windows XP, in the instant after the splash screen appears, press F8, select "Safe Mode with command line" to run.
2, the operation process is stopped, the system lists the Super User administrator and the local user owner's selection menu, mouse click Administrator, enter the command line mode.
3. Type the command: "NET user owner 123456/add", which is mandatory to change the password of owner user to "123456″". If you want to add a user here (for example: Username abcdef, password 123456), please type "NET user abcdef 123456/add", add "net localgroup Administrators Abcdef/add" The command promotes the user to the System Management Group Administrators user with super privileges.
4.DOS Delete the windowssystem32config inside the SAM file can be.
5. Press the DELETE key of the keyboard to enter the BIOS interface after booting. The user password option is found, which defaults to the off state. Start and enter the user password (1~8 bit, English or digital). The computer prompts please enter again to confirm the password is correct, after saving exits restarts the machine, then will appear in the boot the password menu.
Method Four:
If it is FAT32, go to dos, delete c:winntsystem32configsam*.* on it. Login as long as the input administrator not lose the password. Then create a new one. If NTFS is not valid in addition, if your system does not add Microsoft's Input method patches, you can also use the input method of the vulnerability to do an administrator rights account,
Here's how:
After the boot, Win2000 self-boot, the login window appears, display the user name, and ask for a password (of course you will not have a password).
At this point, please put the input focus on the user name, with Ctrl+shift switch Input method (arbitrarily select the one, as long as the Input Method toolbar can appear on the line). Right-click on the Input Method hint toolbar that appears, and select Help to bring up a Help window. Next you need to find a (green underlined) hyperlink in this window, and with shift+ left mouse button click, open it will pop up an IE window, please enter C: in the window Address bar, to this step you should be very clear how to do. Just click on the standard button "up", you will find that you can go to the "Control Panel", you can go straight to the "User and password" next to what happened only you know.
Method Five:
We know that in the process of installing Windows XP, the first sign-in is "Administrator", and then you will be asked to create a new account to log in with this new account when you enter Windows XP, and the Windows XP login interface will only appear the created user account, will not appear "Administrator", but in fact, the "administrator" account is still present, and the password is empty.