Computer Viruses :: essays research papers fc

ready reckoner VirusesA entropy processor calculator virus is an illegal and potentially damaging computer program designed to infect other software by attaching itself to any(prenominal) software it contacts. In many cases, virus programs are designed to ruin computer administrations maliciously by destroying of corrupting data. If the give software is transferred to or accessed by another computer system, the virus spreads to the other system. Viruses have develop 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, saddle virus, and Trojan horse virus. A boot sector virus infects the. When the infected boot program executes, the virus is loaded into the computers memory. at a time the Virus is in memory, it can spread to any floppy plough inserted into the computer. A file virus inserts virus codes into program files The virus consequently spreads to any program that a ccesses the infected file. A Trogan horse virus (named later 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 crack time 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 legal action 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 archive files. The table below outlines some techniques used to encourage computer systems.TableTechniques for virus Protection and System Archive use Virus Protection SoftwareBacking Up Your System insert virus protection software on every computer systemDevelop a regular plan for copying and storing important data and program files.Before use, scan every floppy disk with a virus scan program to check for viruses.Implement a backup plan and adhere to its guidelines.