Table of Contents:
— Introduction
> Step 1: Test Your Internet Connection
> Step 2: Verify Your Yahoo! ID and Password
> Step 3: Test Your Access to Secure Pages
> Step 4: Verify Credentials
> Step 5: Check Connection Settings
> Before You Contact Customer Care
> Other Helpful Information

The inability to sign in to Yahoo! Messenger is a known issue that some of our customers have reported to us. "Known issues" are assigned to our engineering team who continuously work on it for a resolution. The troubleshooting steps in this article, which they developed, have helped some customers and may also help you.

Note: Please download and install the latest version of Yahoo! Messenger, if you haven't already, before proceeding. Our engineers report that this new version has resolved the sign-in issues that many customers had experienced in older versions of Yahoo! Messenger and this may resolve your issue.

If you've installed the latest version of Yahoo! Messenger and are still having trouble signing in, there are several things you can check yourself to see if you can get Yahoo! Messenger up and running again. Please go through these pages that list possible problems, along with steps to verify or resolve the issue.

Next step, go to: Step 1: Test Your Internet Connection