How can Remove Login password in Windows XP

How to Remove Login Password:
Go to Control Panel/Administrative Tools/Local Security Settings
In the left pane click the + sign beside account policies, then select password policies. In the right pane, right click on Minimum Password Length, select properties. Reduce number of characters to 0. Click apply and then OK.
Next go to Control Panel/User Account/Your Account and Remove Password.
If You Cannot Change the Administrator Password in Control Panel:
After you log on as an administrator to a computer that is not a member of a domain, when you double-click User Accounts in Control Panel to change the password for the built-in Administrator account, the Administrator account may not appear in the list of user accounts. Consequently, you cannot change its password.
This behavior can occur because the Administrator account logon option appears only in Safe mode if more than one account is created on the system. The Administrator account is available in Normal mode only if there are no other accounts on the system. To work around this behavior:
- If you are running Windows XP Home Edition, restart the computer and then use a power user account to log on to the computer in Safe mode.

- If you are running Windows XP Professional, reset the password in the Local Users and Groups snap-in in Microsoft
Management Console (MMC):

1. Click Start, and then click Run.
2. In the Open box, type "mmc" (without the quotation marks), and then click OK to start MMC.
3. Start the Local Users and Groups snap-in.
4. Under Console Root, expand "Local Users and Groups", and then click Users.
5. In the right pane, right-click Administrator, and then click Set Password.
6. Click Proceed in the message box that appears.
7. Type and confirm the new password in the appropriate boxes, and then click OK.