Explanation:
A computer virus is a type of malicious software program designed to spread from one computer to another and interfere with normal operations. It attaches itself to legitimate files or programs and replicates when the infected file is executed.
Viruses can corrupt files, consume system resources, steal sensitive information, and disrupt services. Some viruses are designed for minor pranks, while others cause severe damage, such as data corruption or total system crashes.
Antivirus software is commonly used to detect, quarantine, and remove viruses. Keeping software up-to-date and practicing safe browsing habits are essential preventive measures.
Additional Information:
Viruses often spread through infected email attachments, USB drives, and downloads from untrusted websites. Modern fileless viruses can operate solely in system memory, making detection harder.
Signature-based detection techniques are widely used to identify known viruses, but heuristic analysis helps detect emerging threats. The rise of polymorphic viruses, which change their code to evade detection, poses a challenge to traditional security solutions.
Formal Definition:
A virus is a type of malicious software that attaches itself to legitimate files or applications, replicates upon execution, and spreads to other systems, causing harm or disruption.
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