Quick Facts

Introduction to Viruses

  1. What is a computer virus?
  2. What kind of files can spread viruses?
  3. How do viruses spread?
  4. What do viruses do to computers?
  5. Virus Hoaxes

The Importance of Back Ups

Defining the Value of Information Security

Artistic Value

It's the Principle that Counts

Value Squared

Reaching the CEO's

They Just Want to Run Their Business

What kind of files can spread viruses?

Viruses can infect any type of executable code, not just the files that are commonly called 'program files'. Viruses can be spread by:

Since virus code must be executed (run) to have any effect, files that the computer treats as pure data are safe. This includes graphics and sound files such as .gif, .jpg, .mp3, .wav, etc., as well as plain text in .txt files. For example, just viewing picture files won't infect your computer with a virus. The virus code has to be in a form, such as an .exe program file or a Word .doc file, that the computer will actually try to execute.