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What is a Computer Virus?
The term “computer virus” is sometimes used as a catch-all phrase to include all types of malware, even those that do not have the reproductive ability. Malware includes computer viruses, computer worms, Trojan horses, most root kits, spyware, dishonest adware, and other malicious and unwanted software, including true viruses. Viruses are sometimes confused with worms and Trojan horses, which are technically different. A worm can exploit security vulnerabilities to spread itself automatically to other computers through networks, while a Trojan horse is a program that appears harmless but hides malicious functions. Worms and Trojan horses, like viruses, may harm a computer system’s data or performance. Some viruses and other malware have symptoms noticeable to the computer user, but many are surreptitious or simply do nothing to call attention to themselves. Some viruses do nothing beyond reproducing themselves.
Protection against viruses, spyware, hackers, spam, and other internet threats. Has your computer ever been infected with a virus or spyware? According to the 2006 joint CSI/FBI Computer Crime and Security Survey, viruses, unauthorized access, and theft of proprietary information topped the list of reported financial losses. Viruses led the list at $42,787,767, and unauthorized access losses reported at $31,233,100 with theft of proprietary info at $30,933,000