Computer Viruses

A information processing system virus is an illegal and potentially prejudicial computer course of study designed to infect some other softw atomic number 18 by attaching itself to any bundle it contacts. In many cases, virus course of instructions ar designed to damage computer systems maliciously by destroying or corrupting data. If the septic software is transferred to or accessed by other computer system, the virus spreads to the other system. Viruses experience become a serious problem in recent years, and currently, thousands of known virus course of instructions exist (Reed 85-102). Three types of viruses are a commission vault of heaven viruses, file virus, and Trojan horse virus. A boot arena virus infects the boot program used to start the system. When the infect boot program executes, the virus is loaded into the computers remembrance. Once a virus is in memory, it nates spread to any floppy track record disk inserted into the computer. A file virus i nserts virus economy into program files. The virus then spreads to any program that accesses the infected file. A Trojan horse virus (named after the classic myth) hides inside or is designed to look uniform a consistent program. close to viruses interrupt processing by freeze a computer system temporarily and then displaying sounds or messages. new(prenominal) viruses contain era bombs or logic bombs. A time bomb is a program that performs an activity on a particular date. A logic bomb is a program that performs an activity when a certain action occurs, much(prenominal) as an employee beingness terminated. A worm, which is similar to a virus, copies itself repeatedly until no memory or disk space remains. To witness computer viruses, antivirus programs rent been developed. Besides the detecting of the viruses, antivirus programs also have utilities to remove or repair infected programs or files. Some damaged files can non be repaired and must be replaced with uninfected reinforcement files. The...

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