I found this thread while looking for answer to my own pup issues and signed up to say thanks. What worked for me was uninstalling Chrome and then running Malwarebytes Adwcleaner. Ran it a second time and with Chrome uninstalled a got a clean scan this time. Before that it would identify Pup.Legacy.Optional. I would clean it but when I would run it a second time it would be back again. After ...