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Unformatted text preview: program, the operating system, and other programs that normally are read from but not modified. In addition, many antivirus programs automatically scan files downloaded from the web, e-mail attachments, opened files, and all types of removable media inserted in the computer (Karanos 201-205). One technique that antivirus programs use to identify a virus is to look for virus signatures, or virus definitions, which are known specific patterns of virus code. According to Shelly and Cashman Whitney Scott [Type text] Yadav1 ( Antivirus Programs), many vendors of antivirus programs allow registered users to update virus signature files automatically from the web at no cost for a specified time. Updating the antivirus __________________ Bulowski points out that most antivirus program also protect against worms and Trojan horses (55-61)....
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- Spring '10