How to Change a Windows XP Lost Password

Sunday morning. You just had your breakfast, now you're settling in to check your e-mail. A fatal error occurred and administrative access is required to fix it. So you prepare to log in to the administrative account on your computer, and find that the account is password protected, and you can't remember that, since it was probably several months since you installed Windows. You may be thinking "What can I do to change the password or just get administrative access?" Here's one way you can get back in!

Steps
When you installed Windows XP (or when the people who sold you the computer installed it), it created an administrative account automatically. This account has NO password by default, and can be used to access everything in the computer. By accessing it, you can change any password on the system.
Log out all limited user accounts. When a limited user account is logged in, it prevents you from accessing the classic log-in dialogue.
Press CTRL+ALT+DEL twice. Make sure you are at the log-in dialogue. When you do this, the screen will flicker, and you will see the classic log-in that existed on earlier versions of Windows.
Log in to the administrative account. Change the username in the dialogue to "Administrator", and press ENTER or click OK.
Open up the command shell. Press START, click RUN, and type in CMD, press ENTER. This will bring up a window likely unfamiliar to you. This is the command line, it allows you to manage files or change settings without restriction (no restriction on the administrative account). Before the graphical environment of Windows, this is

what Microsoft users used. For more info, PM Boidsie or look it up on a search engine.
Change the password of the account. Type in (without the quotes, and yes, the asterisk (*) is necessary) "net user (username) *". It will ask you to type in a password, then to retype it. You just changed the password!
Log in. Exit the command shell dialogue, don't type in anything else if you don't know what you're doing, you could really hose down your computer. Log out of the administrative account, then log back in to your account with the new password.
3rd party utilities There are many 3rd party utilities which can recover forgotten Windows password:
Windows Password Recovery Tool Service: windowspasswordsrecovery.com
Windows Password Recovery Tool is a program that works instantly to remove any lost or forgotten password. Simply boot your PC from the supplied Boot CD, and get access to forgotten Windows and administrator passwords in just seconds. Their method is so much faster/easier, and works great!
password reset disk
When you enable password for the administrator in Vista or XP on the User Accounts,
 there is an option to solve the problem that you forget password.
If you don't understand clearly, you can refer to this article:

How to use a password reset disk if you have forgotten windows password


reset windows password without data loss
Free download windows password reset 6.0 the iso file
Burn it to a disk to create the boot disk, that simple.
Configure your pc or laptop to boot in the cd drive
Insert the CD, reboot from CD drive, and then just follow the process of instruction.
A few steps later, admin password would be cleared
Took about 5 minutes for the whole process.

Method 2
Open "Control Panel".
Click on "User Account".
Select the account you wanna to set a new password.
Click "changing Account " and "set up password", then fill out the form as listed. Click "Create Password".

Thus, you have a personal login ID and Password, any one has no right to login to your computer with out this info.
If you want to learn how to use the command shell more than that, PM Boidsie or look up "list of MS DOS commands" on a search engine or online encyclopedia.
Login to a computer that can link to Internet. Download A reliable third part tool and decompress it on that PC. Note that: there is a .ISO file. Burn the .ISO file to a CD.
Get out the newly created CD and insert it to the locked computer.