Is siteadv.dll safe or is this task spyware?

Purpose of siteadv.dll:

File purpose and description:

This SiteAdv.dll file was most likely installed by you in the past, as it would not have been preinstalled software on your computer. The exact disk and folder location is also shown below, so you can verify this file is in the right location and is not virus, adware, or spyware related in any way. Writers of spyware and adware will often use similiar or like names, and then place those files in other locations in an attempt to fool you into thinking it is a good file. This file is part of the site advisor software, and this program is a BHO browser module that runs in your Internet Explorer. If you are deleting or removing files on your computer as a spyware removal protection method, then note that this is not considered to be spyware, adware, or virus related. It is considered safe and does not need to be removed. (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 DLL module

File or folder location:
C:\Program Files\SiteAdvisor\6253\SiteAdv.dll is the exact location where this BHO file will be found.

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, siteadv.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 siteadv.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!