What is a virus in the context of computer security?

In the context of computer security, a virus is defined as a code that replicates itself and often causes harm to systems. This self-replicating nature allows it to spread from one computer to another, typically without the user's knowledge or consent. Viruses can attach themselves to legitimate programs and files, leading to various detrimental effects, such as corrupting or deleting data, consuming system resources, and potentially opening backdoors for other malicious activities.

The harmful impact of viruses emphasizes the importance of robust cybersecurity measures, such as antivirus software and regular system updates, to detect and eliminate these threats before they can cause significant damage. Understanding what constitutes a virus is crucial for anyone engaging with information technology, as it forms a fundamental part of cybersecurity awareness and defense strategies.