Summary of Computer Viruses
Robert Thomas, an engineer at BBN Technologies developed the first known computer virus in the year 1971.
Computer virus is a program intentionally written by some software developer to cause damage to the computer, programs and files in which it found itself. It has the ability to replicate itself by changing other programs or files to include a copy of itself.
Computer worms are malicious programs that replicate and spread independently without user action and harm the computer. Worms spread through network and internet to computers that are connected to the internet.
Adware is a software which automatically plays, displays, or downloads advertisements to a computer usually without user’s knowledge.
Types of computer viruses are: boot sector virus, direct action virus, resident virus, multipartite virus, polymorphic virus, overwrite virus, space filler virus, macro virus, stealth virus, executable file virus.
Examples of Viruses are: Trojan horse virus, Sleeper, Logic bomb, Alabama virus, Christmas virus, Jerusalem virus, Resident virus, Nonresident virus, Code Red, I love you, Creeper virus, Stone, November 17.
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