If you see a warning message that says "the certificate used to protect the transmitted information has expired," don't be alarmed. You're getting that message because you are using a browser with a security component that expired at the end of 1999. These browsers include Netscape Navigator versions 4.05 and earlier, Microsoft Internet Explorer 4.01, and 4.5 for Macintosh.

You should upgrade your browser to the current version. Upgrades to software are generally designed to add features, improve performance problems, correct bugs, and resolve security issues from earlier versions. It is important that you maintain up-to-date versions of your software for these reasons.

If you choose to not update, you'll continue to receive the warning every time you try to access a site using SSL encryption.

Browsers that use SSL include Mozilla Firefox, Microsoft Internet Explorer, Netscape Navigator, and Opera. More browsers and links to download them are found in the web browsers category in the Yahoo! Directory.