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Computer viruses

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Computer viruses are programs that can copy themselves and infect computers without permission. True viruses spread when an infected computer is connected to another computer. There are different types of viruses like email viruses, Trojan horses, and worms. Viruses work by executing code and writing to memory when an infected program is launched. Some of the worst viruses in history include Melissa, ILOVEYOU, and MyDoom. People can prevent viruses by using protected operating systems, virus protection software, and avoiding unknown attachments or programs.

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Computer VirusesPresented BySHopNiL MaHmuDA Short Technical Report On
What is Computer Virus?A computer virus is a computer program that can copy itself and infect a computer without the permission or knowledge of the owner. The term "virus" is also commonly but erroneously used to refer to other types of malware, adware, and spyware programs that do not have the reproductive ability.The term "computer virus" is sometimes used as a catch-all phrase to include all types of malware.
How Viruses Work?A true virus can only spread from one computer to another (in some form of executable code) when its host is taken to the target computer; for instance because a user sent it over a network or the Internet, or carried it on a removable medium such as a floppy disk, CD, DVD, or USB drive.Viruses can increase their chances of spreading to other computers by infecting files on anetwork file system or a file system that is accessed by another computer.
Types of VirusesViruses - A virus is a small piece of software that piggybacks on real programs.E-mail viruses - An e-mail virus travels as an attachment toe-mail messages, and usually replicates itself by automatically mailing itself to dozens of people in the victim's e-mail address book.Trojan horses - A Trojan horse is simply a computer program.Worms - A worm is a small piece of software that uses computer networks and security holes to replicate itself.
How Virus Can infect Your ComputerLike biological virus transform into human bodies, computer virus can also pass from one computer to another.In order to replicate itself, a virus must be permitted to execute code and write to memory. If user attempts to launch an infected program, the virus' code may be executed simultaneously and multiply itself.
Virus History & BackgroundTraditional computer viruses were first widely seen in the late 1980s, and they came about because of several factors.When PC’s were started using widespread, virus were created by the programmers.And this trend increased day by day ...
Worst 10 Viruses of The HistoryWorst Computer Virus 10: Melissa (1999)
Worst Computer Virus 9: ILOVEYOU (2000)
Worst Computer Virus 8: The Klez Virus (2001)
Worst Computer Virus 7: Code Red and Code Red II (2001)

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Computer viruses

  • 1. Computer VirusesPresented BySHopNiL MaHmuDA Short Technical Report On
  • 2. What is Computer Virus?A computer virus is a computer program that can copy itself and infect a computer without the permission or knowledge of the owner. The term "virus" is also commonly but erroneously used to refer to other types of malware, adware, and spyware programs that do not have the reproductive ability.The term "computer virus" is sometimes used as a catch-all phrase to include all types of malware.
  • 3. How Viruses Work?A true virus can only spread from one computer to another (in some form of executable code) when its host is taken to the target computer; for instance because a user sent it over a network or the Internet, or carried it on a removable medium such as a floppy disk, CD, DVD, or USB drive.Viruses can increase their chances of spreading to other computers by infecting files on anetwork file system or a file system that is accessed by another computer.
  • 4. Types of VirusesViruses - A virus is a small piece of software that piggybacks on real programs.E-mail viruses - An e-mail virus travels as an attachment toe-mail messages, and usually replicates itself by automatically mailing itself to dozens of people in the victim's e-mail address book.Trojan horses - A Trojan horse is simply a computer program.Worms - A worm is a small piece of software that uses computer networks and security holes to replicate itself.
  • 5. How Virus Can infect Your ComputerLike biological virus transform into human bodies, computer virus can also pass from one computer to another.In order to replicate itself, a virus must be permitted to execute code and write to memory. If user attempts to launch an infected program, the virus' code may be executed simultaneously and multiply itself.
  • 6. Virus History & BackgroundTraditional computer viruses were first widely seen in the late 1980s, and they came about because of several factors.When PC’s were started using widespread, virus were created by the programmers.And this trend increased day by day ...
  • 7. Worst 10 Viruses of The HistoryWorst Computer Virus 10: Melissa (1999)
  • 8. Worst Computer Virus 9: ILOVEYOU (2000)
  • 9. Worst Computer Virus 8: The Klez Virus (2001)
  • 10. Worst Computer Virus 7: Code Red and Code Red II (2001)
  • 11. Worst Computer Virus 6: Nimda (2001)
  • 12. Worst Computer Virus 5: SQL Slammer/Sapphire (2003)
  • 13. Worst Computer Virus 4: MyDoom (2004)
  • 14. Worst Computer Virus 3: Sasser and Netsky (2004)
  • 15. Worst Computer Virus 2: Leap-A/Oompa-A (2006)
  • 16. Worst Computer Virus 1: Storm Worm (2001)How To prevent VirusUsing protected operating system such as Linux, Mac etc would help a great deal to prevent virus infection.Run virus protection software that are easily available in the market and keep them up to date.Avoid programs from unknown sources.For email viruses, take precaution before opening any unknown attachment from unknown sender.Spot the hoax.
  • 17. Stay Aware & Be ConsciousVirus can easily be avoided if we stay conscious about it. Virus is not always a bad thing because it can be used in better purposes.It depends on the purpose you use it.Let’s have a safe and sound future of IT.The exciting stories of viruses can not be presented in such a short time, But we’ve tried.
  • 18. Your questions about Virus?Shopnil.d.rocker@gmail.com