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You can change a Windows User Account password that is on any Windows computer from any other Windows computer regardless of whether the User Account is on a workstation, a stand-alone server, or a Windows domain controller. Additionally, it makes no difference whether the password being changed from a workstation, a stand-alone server, or a Windows domain controller. This is true for any NT 4.0, W2K, XP Pro and Windows Server 2003 computer.
To change a user's password at the command prompt, log on as an administrator and type:

net user danielp * /domain
(This is only an example, use your own username)
When you are prompted to type a password for the user, type the new password, not the existing password. After you type the new password, the system prompts you to retype the password to confirm. The password is now changed.
Alternatively, you can type the following command:

net user danielp 123456 /domain
When you do so, the password changes without prompting you again. This command also enables you to change passwords in a batch file.
Note: If you type these commands on a member server or workstation and you don't add the /domain switch, the command will be performed on the local SAM and NOT on the DC SAM.

Because of the security features built into Windows XP, it is virtually impossible to get back into the system without the password. You have several options to try and get around this problem.

If you have the access to another user account with administrator rights, you can use that account to change the password of the account that is locked out. You can also use the default Administrator account that is built into Windows XP.

First you need to boot the system into the Safe Mode.
1. Restart your system.
2. When you see the blue Dell globe or screen, press the ( F8 ) key about 3 times a second.
3. You should get the windows startup menu. Use the (up or down) arrow keys to highlight (SafeMode)
4. Press (Enter) on (SafeMode), then press (Enter) on (Windows XP).
5. The system should boot to Safe Mode.

Once you are at the Account Log on Screen, click on the icon for the user account with administrator rights, or click on the icon for the administrator account.
Note: For Home the Administrator account isn't normally shown & in Safe Mode you have to press Ctrl+ALt+Delete keys twice to show. For PRO you cando this in normal mode

When the system has booted to the desktop, use the following steps to change the accounts password.
1. Click Start, Control Panel, Administrative tools.
2. Click Computer Management.
3. Double click Local Users and Groups, double click the folder users.
4. Right click on the account name that is locked out, and click on Set Password.
5. You may get a warning message about changing the password, simply click proceed.
6. Leave the New Password box blank , also leave the Confirm Password box blank.
7. Click OK, and OK again.
8. Then close all Windows, reboot the system and try to log in.


There are also applications that can recover the password for you. The following companies provide these applications at a cost.
iOpus* Password Recovery XP here.
LostPassword.com, here
Asterisk Password Recovery XP v1.89 here.
Windows XP / 2000 / NT key here.


If the above information does not help in recovering the password, the only option left is to format the hard drive then reinstall Windows and system software.