Yahoo! Messenger ads are really very annoying and also create delay in opening Yahoo Messenger. Here is a simple software known as Ad Destroy that removes Yahoo Messenger ads. Just run this application and you are done.
How to use this application :

Step 1) Download Ad Destroy 4.0 application from here.

Step 2) Double click on the exe file and you will get a screen shown above. Click on browse and select the folder where Yahoo Messenger is installed. By default it is C:\Program Files\Yahoo!

Step 3) After selecting your folder click on Patch, just wait for 4-5 seconds while the software do its work. Yahoo! Messenger will open automatically, just login to your account and you will not get any ads in future.

This software works fine with the latest version of Yahoo! Messenger.

Note : This software requires Dot Net, if you don't have .Net installed you can install it from here.

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Software Created By : http://shadow-corp.net