what is a computer virus? how does it work e.g trojan, worm, email ect?

Answer 1

The words Trojan, worm and virus are used very often in the same context, but they are not the same. Viruses, worms and Trojan Horses are all malicious programs that can cause damage to your computer, but there are differences among the three.

A computer virus attaches itself to a program or file so it can spread from one computer to another, leaving infections as it travels. Almost all viruses are attached to an executable file, which means the virus may exist on your computer but it cannot infect your computer unless you run or open the malicious program.

A worm is similar to a virus by its design, and is considered to be a sub-class of a virus. Worms spread from computer to computer, but unlike a virus, it has the capability to travel of it's own. . One example would be for a worm to send a copy of itself to everyone listed in your e-mail address book. Then, the worm replicates and sends itself out to everyone listed in each of the receiver's address book, and the manifest continues on down the line.

A Trojan Horse is full of as much trickery as the mythological Trojan Horse it was named after. The Trojan Horse, at first glance will appear to be useful software but will actually do damage once installed or run on your computer. Those on the receiving end of a Trojan Horse are usually tricked into opening them because they appear to be receiving legitimate software or files from a legitimate source. When a Trojan is activated on your computer, the results can vary. Some Trojans are designed to be more annoying than malicious (like changing your desktop, adding silly active desktop icons) or they can cause serious damage by deleting files and destroying information on your system.

Links to download Antivirus programs, which will help you to protect your system
http://www.grisoft.com/
http://www.my-etrust.com/SubscriptCenter/MSTrialRegistration.aspx

http://www.download.com/Ad-Aware-SE-Personal-Edition/3000-8022_4-10045910.html
http://www.download.com/3000-8022-10122137.html


I hope your question is answered, if you still has enquiries, visit our blog J2Next : http://360.yahoo.com/j2next4u and post your queries. Our experts team will guide you.

Wishing you Success!

Answer 2

2

Answer 3

A computer virus is a computer program specifically designed to disrupt a user's computer using experience which also attempt to send itself to other computers, generally over a network or the internet. Viruses range from silly pranks to code which attempts to crash a computer's hard drive. It works by simply being executed by the end user, who is usually tricked into executing it in some form or another.

You can learn more at the WIkipedia article, "Computer virus."
http://en.wikipedia.org/wiki/Computer_virus

Answer 4

A computer virus destroys the computer, slows it down, or just annoys the crap out of you, like constantly restarting. Im not going to say how it works because then youll know how to make one.

Answer 5

download limewire and find out soom as you start downloading from there your have all this on your pc and nortons .macfee/avg anti virus cant get them off

pop up spyware
Spyware
W32/Spybot
Browser Hijackers
Adware
Malware
Keyloggers
trojans
virus
worms
back door trojans
Malicious mobile code
MALICIOUS SCRIPTS
toolbar trojans that dont show up
hacking trojans to take your email accout/passwords
screen name account passwords

Answer 6

initially, the time period "computing device" talked about someone who carried out numerical calculations, oftentimes via a mechanical calculating gadget or analog computing device. Examples of those early contraptions, the ancestors of the computing device, coated the abacus and the Antikythera mechanism, an historic Greek gadget for calculating the moves of planets which dates from about 87 BC. the top of the middle a even as said a reinvigoration of eu mathematics and engineering, and Wilhelm Schickard's 1623 gadget became the first of a number of mechanical calculators built via eu engineers. In 1801, Joseph Marie Jacquard made an progression to latest loom designs that used a sequence of punched paper playing cards as a software to weave intricate kinds. The ensuing Jacquard loom isn't seen a real computing device even if it became an major step interior the type of present day digital computers. Charles Babbage became the first to conceptualize and layout a completely programmable computing device as early as 1820, yet with the aid of a blend of the limitations of the technologies of the time, restricted finance, and an lack of ability to resist tinkering which includes his layout, the gadget became by no ability genuinely built in his lifetime. via the top of the nineteenth century a number of technologies that could want to later educate sensible in computing had appeared, alongside with the punch card and the vacuum tube, and great-scale computerized documents processing utilising punch playing cards became carried out via tabulating machines designed via Hermann Hollerith. in the course of the first 1/2 of the 20 th century, many medical computing needs were met via progressively more beneficial state-of-the-paintings particular-purpose analog computers, which used an instantaneous mechanical or electric powered style of the project as a foundation for computation. those grew to develop into progressively more beneficial uncommon after the type of the programmable digital computing device.