How does a computer virus attack to your computer?

Answer 1

Computer Viruses are mysterious and grab our attention. On the one hand, viruses show us how vulnerable we are. A properly engineered virus can have an amazing effect on the worldwide internet. On the other hand, they show how sophisticated and interconnected human beings have become.

When you listen to the news, you hear about many different forms of electronic infection. The most common are:

Viruses - A virus is a small piece of software that piggybacks on real programs. For example, a virus might attach itself to a program such as a spreadsheet program. Each time the spreadsheet program runs, the virus runs, too, and it has the chance to reproduce (by attaching to other programs).

E-mail viruses - An e-mail virus moves around in e-mail messages and usually replicates itself by automatically mailing itself to dozens of people in the victim's e-mail address book.

Worms - A worm is a small piece of software that uses computer networks and security holes to replicate itself. A copy of the worm scans the network for another machine that has a specific security hole. It copies itself to the new machine using the security hole, and then starts replicating from there, as well.

Trojan horses - A Trojan horse is simply a computer program. The program claims to do one thing (it may claim to be a game) but instead does damage when you run it (it may erase your HDD). Trojan horses have no way to replicate automatically.

Source(Which the first author forgot to recognize): http://www.howstuffworks.com/virus.htm

Answer 2

Here is the detailed story about the working of computer viruses

http://www.honeytechblog.com/how-computer-viruses-work/

:)

enjoy..!!

"Human Knowledge Belongs To The World"

Answer 3

A computer is infected through some malicious program, malware, virus, Trojan or worm. Their ways of infection differs from type to type. They have some targets to infect and do their job for what they are written.

Answer 4

Viruses are specially designed computer programs (software's) to disturb the normal working / flow of the target computer system. Some viruses might have instructions to remove data from one/s computer and some might have the code to duplicate it for an infinite time. Also some might contain the logic for affecting system hardware. In each case, they interrupt the normal flow of computer working and might lead to low system performance or sometimes failure as well.

Answer 5

A virus can infect a computer in just about any way possible. Through word documents (macros) internet webpages(downloading files without your knowledge), USB, EXE files and zip folders.

The virus can enter from any way data can enter or leave your system.

Answer 6

What happens is you get alot of different things happen to your computer like messages coming up onto you screen or deleted files and many other attacks can happen