Wanted to throw in that Sophos Home (free and beta) has been updated with Malicious Traffic Detection (MTD) and Download Reputation. In a nutshell, MTD looks for traffic between a program or file on your computer and a command-and-control server. If a malicious traffic connection is found, Sophos Home will take action against the program/file. Download Reputation checks the file you're downloading against a vast database of downloadable files, letting you know if said file has a history of being malicious or full of malware, adware, etc., allowing the user to avoid the download.