Windows Defender "isn't working" for you but that "possible threat" you encountered is just the installer. Most of us who do not want the optional apps and utilities it tries to get you to install simply make use of the Direct Download link.
If you go back to that link you provided you will find the Direct Download link immediately below the green rectangular Download Now button that also says CNET installer enabled followed by an information icon (and if you move your mouse cursor over that you get a pop-up message box that tells you what it is).
So, I downloaded this file onto my computer wanting to edit it.
Windows Defender detected harmful software, so I moved it to the vault. Afterwards, I deleted the traces of what I had downloaded and tried to scan my computer...
Windows Defender isn't working...
I would like if somebody could remove this file or do something about it. This has discouraged me from using cnet again. I'm not trying to sound angry, i'm just requesting that this file should be removed from the site because it has infected my computer, and probably other people's computers, with malicious software. Thanks!