Is yt.dll safe or is this malware?

Purpose of yt.dll:

yt.dll file purpose and description:

Yt.dll is software program that was most likely installed by you on your computer. I have listed the exact disk location for you below, so you can help identify that this program is not spyware, always verify the file is in the proper location as the folder location is shown below. This yt.dll software is part of the Yahoo companion software, and it is a BHO that runs in your web browser. This will appear on your computer if you install Yahoo IM and choose all default options. This is also why I don't just take the defaults when installing software as sometimes it puts extra stuff on your computer. This file is considered safe and is not considered spyware, virus, or adware related software. (See the details below for the actual location of this file.)

Actual file or task name: (Note that you can view the entire list here)

File type:
This is a called DLL module

Where is the file or folder located on my computer?
This file will be found at: C:\Program Files\Yahoo!\Companion\Installs\cpn2\yt.dll

General information:
Be aware that many tasks will be similiar names to existing tasks or processes. You can always view the running tasks on your computer by pressing ctrl-alt-del to view the windows "task manager", and then view the "processes" tab. This will show you all tasks running or currently active on your PC. Although this shows you all running tasks, it does not show dll file thats are loaded, as they get loaded as part of other processes. Many spyware writers attempt to hide their files on your computer, for example, yt.dll may be intentionally misspelled to look like a similiar task, or spyware may be named very similiar to a Windows system task. The reason they do this is so you cannot easily recognize the name in your tasklist as I have mentioned above. Make sure always check the location of the file if you are concerned. You can always find the location of yt.dll on your computer by using your Windows search options, but I will also try to list the file location of every file described on this website, so you can verify the correct location. You can view the entire tasklist directory with the link below.

Jump to the entire processes list here!