I am (was) running a free trial of McAfee, which I was intending to remove to install Avast, so I clicked on your link, TD, and the file downloaded straight away, and of course I had to open it to have a look, and before I knew it, McAfee was uninstalled.
Happily, I now have Avast running successfully, and freely. I have used it before so know I will be okay with it