Anti-Virus is software dedicated to locating, combating, and removing harmful programs such as malware, adware, and spyware. Simply put, it is tasked with protecting your computer from potential external attacks.
With this knowledge, millions of computer users have installed anti virus programs on their machines for basic protection. In fact, a plethora of Internet users may have more than one antivirus machine running on their computer. While this, generally, is not a good idea, it is not too difficult to see at the blindingly fast speed the Internet changes at.
The simple fact is that virtually any user connected to the Internet can be infected with a virus. A user who does not connect to the Internet can still be infected through direct means, but chances are lower. With the increasing number of viruses being created, tested, and distributed daily, it becomes even more important to understand how viruses work and how they attempt to disrupt the three pillars of security: confidentiality, integrity, and availability.