Almost everyone has forgotten an important password. Forgetting your Windows XP password can be especially frustrating, but it's still possible for you to reset the password and log into your computer without years of training or special knowledge.
Use the Administrator Account
Step1
Power up your computer. Step2
Log in as the Administrator. The Administrator setting allows you to reset any password using the "Control Panel" and "User" menus. Step3
Select an account to change, and then select "Change the Password." Step4
Enter a new password at the prompt. Input a password hint for the future to avoid having to reset your password again. Step5
Restart the computer, and log into your account with the new password. You Do Not Know the Administrator Password
Step1
Shut down or restart your computer. While your computer is booting, press the F8 key repeatedly until the "Boot Menu" appears and you can select "Safe Mode." Once you select "Safe Mode," press "Enter." Step2
Click on the "Start" menu and then click "Run." Step3
Type "control userpasswords2" in the dialog box that pops up, and then click "OK." Step4
Click on the account you forgot the password for and select the reset option. Step5
Input a new password into both the "New Password" and "Confirm Password" areas. Select "OK." 
