Malware - Scareware

[Resheph]

This type of malware warns the victim of potential harm that could befall them if they don't take some sort of action. Typically, this action involves providing a credit card or doing something else to buy a utility they need to clean their system. In many cases, the utility the victim is buying and installing is actually something else, such as spyware, adware, or even a virus.
This kind of software relies on the ignorance or fear of potential victims who do not know that they are being played.