1. A computer system comprising the following: one or more processors; system memory; one or more computer-readable storage media having stored thereon computer-executable instructions that, when executed by the one or more processors, causes the computing system to perform a method for determining a risk of encountering malware based on social context, the method comprising the following: an act of receiving a malware notification associated with a user, the malware notification identifying at least one type of malware encountered by the user; an act of identifying one or more persons that are part of a social group associated with the user; and an act of determining that at least one of the identified persons associated with the user has an increased likelihood of encountering the identified type of malware, based on information derived from the act of identifying.