Log in to your account as usual with the verification code. If you are using your home computer, choose "Yes, register my private computer." Then, whenever you login from that computer, you'll automatically have the added protection, and you'll only need to enter your normal login information--your username and password. If you login from a different computer, you will be asked for additional information in order to login. Please note that if you use multiple browsers within the same computer you will need to add extra security to each browser separately by using the same steps above.