It's being said that changing your Windows XP password regularly is a good idea, in this way you keep your PC secure. The procedure of changing your password is easy and below are the steps you need to take:
1. Open User Accounts in Control Panel (Start -> Control Panel -> User Accounts).
2. Click your account.
3. Click Change my password.
4. Type your current password in the Type your current password field.
5. Type your new password in Type a new password and Type the new password again to confirm fields.
6. You can type a word or phrase to use as a memory aid for the new password in Type a word or phrase to use as a password hint.
7. Click the Change Password button to confirm your changes.
8. From now on you must use your new password to log on to Windows XP.