Learn About PC Virus :: Computer Virus

Learn About PC VirusA computer computer computer virus is a potentially minus computer course designed to affect, or infect, yourcomputer negatively by altering the way it works without your knowledge or permission. Morespecifically, a computer virus is a segment of program code that implants itself in a computer filing cabinetand spreads systematically from one file away to another. Viruses dope spread to your computer if an infect floppy phonograph record is in the disk drive when you boot the computer, if you run an infectedprogram, or if you open an infected information file in a program.Computer viruses, however, do not generate by chance. Creators, or programmers, of computervirus programs write them for a specific purpose usually to cause a certain attribute of symptom ordamage. Some viruses are harmless pranks that simply freeze a computer temporarily or displaysounds or messages. When the symphony Bug virus is triggered, for example, it instructs thecomputer to pl ay a few chords of music. new(prenominal) viruses, by contrast, are designed to destroy orcorrupt data stored on the infected computer. Thus, the symptom or damage caused by a viruscan be harmless or cause earthshaking damage, as planned by its creator.Viruses have become a undecomposed problem in recent years. Currently, more than 45,000 knownvirus programs survive and an estimated six new virus programs are discovered each day. The change magnitude use of networks, the Internet, and e-mail has accelerated the spread of computerviruses, by allowing individuals to distribute files and any related viruses more easily than ever.Types of VirusesAlthough numerous variations are known, quaternion main types of viruses exist boot sector viruses,file viruses, Trojan gymnastic horse viruses, and macro viruses. A boot sector virus replaces the bootprogram used to start a computer with a modified, infected recitation of the boot program. Whenthe computer runs the infected boot progra m, the computer scores the virus into its memory. Oncethe virus is in memory, it spreads to any disk inserted into the computer. A file virus attachesitself to or replaces program files the virus then spreads to any file that accesses the infectedprogram. A Trojan horse virus (named after the Grecian myth) is a virus that hides within or isdesigned to look equal a legitimate program. A macro virus uses the macro quarrel of anapplication, such as word processing or spreadsheet, to hide virus code. When you open adocument that contains an infected macro, the macro virus loads into memory. Certain actions,such as opening the document, activate the virus.