What Is a Bad Computer Virus
A bad computer virus is malicious software that attaches to legitimate files or programs and spreads without user consent. It can corrupt data, slow systems, or steal sensitive information. Unlike benign software, viruses are designed to cause harm or disruption.
Common Types of Computer Viruses
File-infector viruses attach to executable files and spread when programs run. Boot-sector viruses target the system startup process, making removal difficult. Macro viruses hide in documents and activate when opened. Polymorphic viruses change their code to evade detection.
How Viruses Spread and Protect Yourself
Viruses spread through email attachments, malicious downloads, infected USB drives, and compromised websites. To reduce risk, use updated antivirus software, enable firewalls, and avoid suspicious links. The Cybersecurity and Infrastructure Security Agency provides guidance on recognizing and preventing malware infections at Secure Our World.
