I am looking for an answer about the conversation box and its content.?

[Luke]

This sounds like it may be some type of virus of spyware that has found it's way onto your computer.

Viruses and spyware are hidden programs running on your computer and can be installed into your system without your knowledge. You may have unknowingly installed malicious software when you downloaded programs from the Internet or installed software from disks. These programs are easy to install but often difficult to remove without downloading specialized anti-virus or anti-spyware programs.

We recommend that you update your anti-virus and anti-spyware programs and scan for any unwanted programs that could be hidden on your computer. If you do not currently have this type of software installed, you may want to consider installing it in order to protect your system and data.

To learn more about how to protect your computer from viruses, spyware, and other malicious software, please visit the Yahoo! Security Center.