That while I really really REALLY like Grif's list at http://www.cnet.com/forums/discussions/how-to-remove-pup-option-603542/#post-f742c795-5881-433b-a29b-6d758efe5cd3
this doesn't mean it's gone for good.

That is, you have some PC users that just can't resist using Torrents and going to bad sites. So the infection reoccurs.

YOU remain the best protection.

That said, I use a rather simple protection system today. Ready?

1. Windows Defender. Just learned it has a new trick!
https://www.google.com/search?q=windows+defender+offline

2. For Firefox I use 2 add ons for protection.
a. Web Of Trust (AKA WOT)
b. Ublock Origin. Many like Adblock+

Good hunting.