Copy/ paste from Yahoo Messenger Help...http://help.yahoo.com/l/us/yahoo/messenger...ssenger-05.html
Why do I receive an error when running Yahoo! Messenger?
Best guess? You might have a corrupt file in your Yahoo! Messenger directory. To fix the problem, you must manually delete the Messenger directory on your C: drive (default), then reinstall the Yahoo! Messenger application.
To delete the directory:
Close the Yahoo! Messenger application if you currently have it running. Make sure all instances of Internet Explorer are closed.
Go to your desktop and double-click "My Computer."
Click the "C:" drive.
Highlight the Yahoo! Messenger folder and press the Delete key on your keyboard. (All archives will be deleted if they are not copied. Please see below.)
Close all running applications except for your Internet browser.
Visit the Yahoo! Messenger home page.
Click the "Download Now" button.
To copy your complete Message Archive:
Close Yahoo! Messenger (if it is currently running).
Go to your Desktop and double-click "My Computer."
Select the "C:" drive.
Your "Profiles" folder contains your complete Message Archive. Copy it to the same location on another computer if you wish to view it elsewhere.
Note: If you copy this folder to another computer, your complete Message Archive will be copied, overriding the Message Archive on the computer to which you are copying. http://help.yahoo.com/l/us/yahoo/messeng.
IMPORTANT: If all of the above does NOT answer your question or solve your problem, here is a link to Yahoo! Messenger 8 Help Form:http://help.yahoo.com/l/us/yahoo/messeng.
For future reference, please note there is a link to Yahoo Messenger Help at the very top of your Yahoo Messenger!
Edited by boopme, 05 January 2008 - 07:26 PM.