A computer virus is a type of malicious software that can spread from one computer to another, infecting files and programs. Viruses can cause a variety of problems, including data loss, system crashes, and security breaches.
Viruses are typically created by attackers who exploit vulnerabilities in software. Once a virus has infected a computer, it can replicate itself and spread to other computers on the same network. Viruses can also be spread through email attachments, malicious websites, and USB drives.