Passwords. Those ubiquitious alpha-numeric codes that protect us and give us access to everything digital. Unfortunately, passwords can be confusing because, though your computer likely won’t forget a password, you very well might. When this happens, you can be locked out from your whole system, as in the case of the Windows XP Administrator Password. This article will show you how to remove an Administrator password.

Instructions:
Step 1 Insert your Windows XP CD into your CD drive and boot your computer. If you receive the message “press any key to boot from CD,” press any key.

Step 2 Press Enter to setup Windows. After accepting the license agreement, you wil be asked if you want start a Repair process.

Step 3 Press R to begin the Repair process. Setup will now check your disks and then start copying files, which can take several minutes. After this, reboot. Let the computer boot normally (do not press a key to boot from CD).

Step 4 Keep your eye on the lower left hand side of the screen. When you see the Installing Devices progress bar, press SHIFT + F10. This will open a command line console.

Step 5 Type NUSRMGR.CPL at the prompt and press Enter. This will give you access to User Accounts. Remove or change your password. Write it down! After the repair is finished, you will be able to log on with your new password.

Second way:

there is some recovery tool like  Windows Password Recovery Tool 3.0 can help you.
Good luck!

Windows Doctor

Article Source:http://www.articlesbase.com/operating-systems-articles/forgot-windows-password-1362772.html