Computer Viruses :: essays research papers fc

Computer VirusesA computer virus is an illegal and potentially prejudicial computer program designed to infect other software by attaching itself to any software it contacts. In many cases, virus programs are designed to price computer systems maliciously by destroying of corrupting data. If the infected software is transferred to or accessed by another computer system, the virus spreads to the other system. Viruses arrest become a serious problem in recent years, and currently, thousands of known virus programs exist (Reed 85-102)b.Three types of viruses are a boot sector virus, file virus, and Trojan vaulting horse virus. A boot sector virus infects the. When the infected boot program executes, the virus is loaded into the computers memory. Once the Virus is in memory, it stern spread to any floppy disk inserted into the computer. A file virus inserts virus codes into program files The virus then spreads to any program that accesses the infected file. A Trogan horse virus (na med after the Greek myth) hides within or is designed to look like s legitimate program.Some viruses interrupt processing by freezing a computer system temporarily and then displaying sounds or messages. Other viruses contain time turkeys 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 execution occurs, such as an employee being terminated. A worm, which is similar to a virus, copies itself repeatedly until no more memory of disk space remains.To find computer viruses, anti-virus programs have been developed. Besides detecting viruses, anti-virus programs also have utilities to remove or repair infected programs and files. Some damaged files cannot be repaired and must be replaced with uninfected history files. The table below outlines some techniques used to protect computer systems.TableTechniques for virus Protection and System ArchiveUsing Virus Protection parcelBackin g Up Your SystemInstall virus protection software on every computer systemDevelop a regular syllabus for copying and storing important data and program files.Before use, scan every floppy disk with a virus scan program to check for viruses. mechanism a backup plan and adhere to its guidelines.