| Viruses are programs or codes that is loaded in the | | | | information for commercial purposes and its major |
| computer with the aim of creating a disruptive situation | | | | tasks include; delivery of unwanted advertisements, |
| in the operations of the system. It has the tendencies | | | | theft of personal information, supervising |
| to replicate itself. Therefore virus has a very | | | | Web-browsing activity for marketing purposes and |
| destructive tendencies. | | | | transmission of HTTP requests to advertising sites. |
| Worms are also computer viruses that are | | | | Adware is also a type of spyware that follow the |
| self-propagating. We can say that a worm is a | | | | users browsing patterns and then transfer them to |
| computer virus, and they have tendency to regenerate | | | | advertising companies, just for marketing and it |
| for in order to wreck more havoc on the affected | | | | noticable when a sudden pop adverts interupts during |
| system. It can use all of a computer's resources and | | | | systen usage. Computer hacking is a common |
| shut it down. | | | | problem that occurs everyday, and it is due to the |
| Spyware is a program that can follow your actions | | | | activities of spywares or viruses that steals all private |
| and your internet use. It can access your passwords, | | | | information without permission and also it is very costly |
| your key words and what ever you typed on your | | | | to manage. |
| computer, or it is a program which can gather | | | | Therefore, it is necessary to protect your computer |
| information about your internet usage, just for | | | | from attacks of viruses by installing anti-spyware or |
| advertising purposes. | | | | anti-viruses programs. These programs are easily |
| It usually gathers information from the user and | | | | available on internet and their soft wares are also |
| transfers it to some other user in the background. It | | | | accessible very where. |
| can take information from e-mail addresses. It gathers | | | | |