I had been using Webfetti to send Birthday wishes to members here. The last time I went to the site, it prompted me to upgrade. I chose to upgrade, clicked Next, and then noticed a little box that was checked to add MySearch or something like that. It installed itself on my computer, and I could not find it anywhere to get it off. It was a tracking software. I ended up getting Trojans, PUPS, and I forget what else, but none of it good. He told me that there are many websites out there that once you click on them, they add things to your computer. I recently had a virus and had to wipe out my whole drive. Every time I found and deleted files associated with it, it would recreate them in other locations. I used McAfee, and that didn't find any of these things.
The IT guy told me about free antivirus software, anti-adware, and spy detection programs that he uses. Check them out. They are:
Spybot Search & Destroy
I loaded these programs, and they found and deleted the files McAfee didn't detect.