What is a computer virus?

A computer virus is defined as a malicious software program designed to replicate itself. This means that when a virus infects a host computer, it attaches itself to legitimate programs or files and then spreads to other systems when those programs are executed or shared. Viruses can cause various types of damage, including corrupting data, stealing personal information, or causing system crashes. Their self-replicating nature is what distinguishes them from other types of malware, as they can create multiple copies of themselves and spread through networks, email attachments, or infected downloads.

Understanding the characteristics of a virus is crucial for both users and IT professionals in order to implement effective security measures, such as antivirus software and safe browsing practices, to prevent infection and mitigate potential damage.