Learn About PC Virus :: Computer Virus

Learn most PC VirusA computer computer virus is a potentially damaging computer program designed to affect, or infect, yourcomputer negatively by altering the way it works without your knowledge or permission. muchspecifically, a computer virus is a segment of program enroll that implants itself in a computer commoveand spreads systematically from one file to another. Viruses can spread to your computer if an give floppy disk is in the disk drive when you heyday the computer, if you run an infectedprogram, or if you sluttish an infected data file in a program.Computer viruses, however, do not generate by chance. Creators, or programmers, of computervirus programs make unnecessary them for a specific purpose usually to understanding a accepted type of symptom ordamage. Some viruses be harmless pranks that just now freeze a computer temporarily or displaysounds or messages. When the Music Bug virus is triggered, for example, it instructs thecomputer to play a fewer chords of music. Other viruses, by contrast, are designed to destroy or pamper data stored on the infected computer. Thus, the symptom or damage caused by a viruscan be harmless or cause significant damage, as planned by its creator.Viruses have become a serious problem in recent years. Currently, more than 45,000 knownvirus programs exist and an estimated six new virus programs are discovered distributively day. Theincreased use of networks, the Internet, and e-mail has accelerated the spread of computerviruses, by allowing individuals to share files and whatever related viruses more easily than ever.Types of VirusesAlthough numerous variations are known, four main types of viruses exist boot sector viruses,file viruses, trojan horse horse viruses, and big viruses. A boot sector virus replaces the bootprogram used to start a computer with a modified, infected version of the boot program. Whenthe computer runs the infected boot program, the computer lashings the virus into its memor y. 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 aft(prenominal) the Greek myth) is a virus that deals within or isdesigned to timbre like a legitimate program. A macro virus uses the macro language 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.