Free But Fake: Rogue Anti-Malware
Most antivirus products are commercial and typically offer, as is the case with ESET solutions, free trial versions for a 30-day period. This limitation is the perfect excuse for criminals to recommend their "Free and magical" antivirus software which guarantees to solve problems that the user does not really have. These kinds of programs are called "Rogue Anti-Malware" or "Purportedly Protective Programs" and their creators want users to download them in order to infect their systems, while believing that they are protecting themselves. In many cases, a Social Engineering technique is used to trick the user into downloading a malware application in the belief that they will receive a product which is both desirable and free.