A significant amount of malware infections and potentially unwanted program (PUP) irritants are the result of downloads from unreliable sources. Malware peddlers can hide their malware in malvertising in the form of downloads or even drive-by-downloads, in which users neednt install a single file, to be infected. There are some checks you can do before you visit the download site, too. Check for the green padlock, use a trusted antivirus or browser extension, such as Browser Guard.”]