Purchased stopzilla antivirus couple months ago or so. It did stop adware that was causing problems at the time. However recently the counterflix virus took over my computer and even disabled the stopzilla program from running on my computer. Called stopzilla customer support and found them very argumentative, rude and they said 'stopzilla can't stop a virus if you download it'. They also refused to refund my money and told me to call the Missouri Attorney General's office as I did tell them I would do so if they did not refund my money. They put me on hold five or six times and kept playing circular word games entire converstation.