Messenger stores that sign in information until you manually go back in and change it. Therefore, if you change your Yahoo! account passwo...

- If you have forgotten your password, see our help article about recovering a lost or forgotten password . Under " Sign-In and Security," clickMessenger 11.5 | Messenger 11 | Messenger 10 and earlier | Messenger Mobile | Messenger iPhone | Messenger Android

This document describes how to reset Messenger so it prompts for your id and password at each sign inMessenger 11.5 | Messenger 11 | Messenger 10 and earlier

Open Yahoo! Messenger and sign in .

To edit your credit card information in your Yahoo! Wallet: Go to your Yahoo! Wallet and sign in with your Yahoo! ID and passwordMessenger 11.5 | Messenger 11 | Messenger 10 and earlier | Messenger for Mac

Click here to sign in (if you haven't already). Click Edit next to My Yahoo!

This is useful for troubleshooting problems that might be caused by settings that were previously changed after installation. When you delete personal settings, some web pages that rely on previously stored cookies, form data,Messenger 11.5 | Messenger 11 | Messenger 10 and earlier

To reset the connection settings in Internet Explorer: On your keyboard, hold down the Windows logo key and press the R

In the meantime, as a possible solution, please sign out of Yahoo! Messenger and sign in again.

Check your computer for malware: Malware installed on your system may cause your account to send spam, even after a password change .Messenger 11.5 | Messenger 11 | Messenger 10 and earlier | Messenger Mobile