Create a Password Reset Disk.

If you’re running Windows XP Professional as a local user in a workgroup environment, you can create a password reset disk to log onto your computer when you forget your password. To create the disk:

Click Start, click Control Panel, and then click User Accounts.
Click your account name.
Under Related Tasks, click Prevent a forgotten password.

Follow the directions in the Forgotten Password Wizard to create a password reset disk.

Store the disk in a secure location, because anyone using it can access your local user account.