Computer viruses generally operate through four distinct phases:
A computer virus is a specific type of malicious software () designed to replicate itself by inserting its own code into other programs, files, or the operating system. Much like a biological virus needs a living cell to reproduce, a digital virus requires a host program and typically some form of user action to activate and spread. How a Virus Functions What Is a Computer Virus?im
: A specific event—such as a date, a time, or a user opening an infected application—triggers the "payload". : Once activated, the virus begins replicating, copying
: Once activated, the virus begins replicating, copying its malicious code into other files, folders, or programs across the system. : Once activated
: The virus carries out its intended malicious activity, which can range from minor pranks to severe system damage. Common Types of Viruses
: The virus remains hidden on the system, often attached to a legitimate file, waiting for a specific trigger.