What do computer virus look like and how do they create these?

Answer 1

Viruses are bits of code attached to other programs that replicate themselves onto other programs when they are activated. There nothing to look at since they are just 0's and 1's, machine code for the computers instruction. They usually manage to overflow a particular section of memory and use the overflow to point to another random program. There are more complicated versions of this idea written in higher level scripts and languages, but chunks of replicating information on a computer is what is critical here.

Usually they need an exe file, mostly from downloads, and can have numerous effects, most of the time negative on your computer.

Answer 2

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Answer 3

A computer virus is just a (normally) small computer program that does something malicious. (ie. deletes system files that are needed to run other programs successfully) they may allow open ports to outside access (this is called a trojan) which will then allow access to your computer, or they may just do something annoying like pop up a box asking you if you have a small penis , and make you click OK :)

The only way a virus can get onto your computer is buy you allowing it to run, a program cannot run automatically. All viruses get introduced initially by the user either running the program or having other viruses on the system which can in turn then run other viruses if they are found.

You may not necessarily know you are running the program (virus) if you did you obviously wouldn'd do it, so the virus is normally concealed in some way. A popular way to do this is to send a Microsoft Word, Powerpoint, Excel document in an email that might have some catchy name, or has some joke/funny picture etc. All these file types can contain things called Macro's which are capable of running other programs. So the word document has a macro in it that runs when you open the document, the macro has been written to run the virus program and you get infected.

There are other way to get infected, going to some websites that have active content (allows access to your computer file system) can cause you to get infected. In this case the active content would be written to do the same thing as above, you would unknowingly allow the virus to be run.

Good ways of avoiding getting viruses are to turn off auto matically allowing Microsoft Word to run macros, then if you open the document you will be asked if you want to run the macro... obviously dont say yes.

Not allowing active content to run if you are on some dodgy website and NEVER opening any attachments to email with file extensions like .exe

Answer 4

A computer virus is just a form of computer software.

Answer 5

A computer virus is just another program (harmful).

These programs are typed Stuffs in various varities & programming done by various means.

These are programmed to cause harm to the computing machine where it is activated .

These programs come in various forms causing various damages.

Answer 6

You can't see tem; you can only see their effects. They ride piggy back on downloads, and they have been created by hackers who enjoy this type criminal of vandalism. They cause your computer to do things you don't want them to do, or not do things you want them to do. They can make your computer crash(not function at all).You can prevent them by getting a good firewall programm, and not download emails unless you know who they are from.

Answer 7

Like miniature crickets with pinchers, nastly little things. This is why computers are stored in boxes with fans. The fans blow them back out, that's why its important to have your fans facing the right direction.
They come from the same place babies come from, General Electrics north pole factory (where they manufactured millions of north poles and only sold one).

Answer 8

They look like numbers. I'm not sure how there made.

Answer 9

they are written codes(software), just like other applications.

Answer 10

http://en.wikipedia.org/wiki/Computer_virus

see above.. for complete definitions as well as history.. c",)