2slickdc
In windows xp pro, once the password screen appears with your user name and password box; hit the control alt delete buttons at the same time twice and it should take you to the administrator sign in. if there is no password set on the administrator account then just press enter, and that should let you in to the account. if you are the administrator and you are set up on the admin account then when you re start the computer hit f-8 and start up in safe mode and create a guest account.