Your Yahoo! ID is stored as a cookie on your computer. This allows you to be logged in automatically to your Yahoo! account.

If you upgrade your computer software, change computers, delete your Internet files, or click "Sign Out," the cookie will be erased from your computer's hard drive.

To retrieve your information, enter your Yahoo! ID and password in the spaces provided either on the Sign-in page or the Guest page, and click "Sign In." There’s no need to register for a new account.