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A computer virus is a malicious software program (also called malware). A virus requires a host executable file or document to function. When a computer user opens the infected file, the action triggers the replication of the virus code. Copies of the virus code may then immediately deliver their payload or lie dormant until specific conditions trigger the delivery of the payload. A virus’s payload causes detrimental effects to the computer. The copies can further infect other files in the same computer, and eventually spread through computer networks and the Internet. Viruses differ in the type of damage they cause and mode of infection.
You can protect your computer from virus attacks by using antivirus programs. They provide the following security features:
They prevent the entry of malicious software into a system.
They detect any malicious software in a system, on attached drives, or in infected software.
They remove malicious software and clean infected files.
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