COMPUTER VIRUS

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COMPUTER VIRUS
DHRUV SHARMA TIM GRANT ALEX ZED
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CONTENTS

• What is Virus ?
• History of Viruses
• The first Virus . . es??
• Since the first viruses
• What does a Virus do?
• Protection Against Viruses

• ADVANTAGES AND DISADVANTAGES
• INFASTRUCTURE
• RECAP
• REFRENCES
• QUESTIONS

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WHAT IS A VIRUS ?

• A computer program which can copy itself and
  infect a computer without the users permission
  or knowledge.
• Computer Viruses are designed to distribute from
  computer to computer and to cause interference
  with the computers operations.

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History of Viruses

• 1949- John Von Neumann devises theory of self
  replicating programs
• 1963- Programmers develop the American Standard
  Code for Information Interchange (ASCII)
• 1979- Engineers at Xerox Palo Alto Research
  Center discover the computer "worm

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The First Virus..es?

• 1981
• The first virus in the wild was named Elk
  Cloner and was spread on Apple II floppy disks
• 1986
• The first MS-DOS virus dubbed Brain invented by
  two Pakistani brothers
• Virdem, the first file virus was released
• The first PC-based Trojan was released
• 1988
• The first Macintosh virus appears, MacMag
• The first internet crisis is caused by internet
  worm
• 1991
• The first polymorphic virus, Tequila

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Since the First Viruses

• Different types of viruses conceived and written
• Viruses get more complex
• Viral attacks become more frequent
• People use viral attacks for purposes as
  described by Mikko Hypponen in the link

Click Picture
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What Does A Computer Virus Do?

• Some Viruses are designed to cause destruction
  to the computer by causing damage to programs,
  deleting files or by changing the hard disk.
• There are viruses which do not cause damage but
  simply replicate themselves and cause problems
  for the computer user by taking up computer
  memory or causing a computer crash or data loss.

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What A Computer Virus Does

• Computer Viruses are usually attached in email
  messages or through instant messaging.
• Computer Viruses can usually be distinguished as
  attachments of funny images, greeting cards, or
  as audio and video files.
• Computer Viruses can also spread through
  downloads on the internet.
• Computer Viruses infect from computer to computer
  usually by infecting files on a network file
  system.

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PROTECTION
4. Scan All Drives.
Tips
5. Purchase Antivirus Software. 
1. Avoid Unknown Attachments.
2. Avoid Bootleg or Pirated Software
The Best Defense How-To Protect Against
Computer Viruses Preventing a viral infection of
your computer is much easier than eliminating one
you have already contracted.
3. Back It Up
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ANTI-VIRUS SOFTWARE

• Many Choices
• Install virus protection software, which include
  features such as firewall, pop up blockers, spam
  filters
• If bought legally, software updates automatically
  
• Keep your computer protected all the time

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RECAP
Development of Viruses
What is Virus
Protection (Tips)
History of the Virus
Anti-Virus Software
What does a Computer Virus do?
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REFRENCES

• http//www.aarp.org/learntech/computers/howto/a200
  2-07-18-virus.html
• http//www.newton.dep.anl.gov/teachers/compvir.htm
  
• http//www.microsoft.com/protect/computer/basics/v
  irus.mspx
• http//www.washingtonpost.com/ac2/wp-dyn/A50636-20
  02Jun26
• http//debbienathan.com/wp-content/uploads/2007/11
  /computer-virus.jpg

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THE END