The AntiVirus industry is a snakeoil industry. Their products barely work and if they do, they do while sucking a lot of performance out of your device. If you

The AntiVirus industry is a snakeoil industry. Their products barely work and if they do, they do while sucking a lot of performance out of your device. If you absolutely want one, install ClamAV. Then use uBlock Origin + HTTPS Everywhere on your browser and PiHole on the network. Install all updates on devices, devices with no updates are isolated into a separate network. Use a password manager and SSH keys, disable password auth on all SSH servers you connect to. Close all ports to the outside that are not necessary and could be accessed with a VPN instead (keep one SSH port open to repair said VPN). Do not download email attachments you did not prompt for. If you need to open email attachments (ie you're HR and you received a Resume), make sure it's a real file and not a fake (a .pdf.exe) or ask for a share link from a popular storage provider (Nextcloud, Google Drive, Dropbox, etc.). The above notes should get you protected better than 99.9% of people on the internet.