Use of antivirus is highly recommended, but not all are worth it, given a specific name could have also helped since some antiviruses can actually be the virus you are trying to prevent itself, especially the free antiviruses that could be found everywhere on the internet, while some viruses can't even be detected by your paid antivirus. We never can just be too careful, which is why it's safer to use different gadgets for different purposes to reduce the risk of getting attacked from unknown sources.