It is generally considered unethical because Computer Viruses and other malicious programs harm other people's computers, which are other people's property. They also can violate other people's privacy, and also that you are accessing their computer without their permission.
get on the computer
Creating a computer virus is unethical because viruses do things on people's computer's without their permission. Creating and distributing a computer virus would be like using their computer without their consent. Also, depending on what the computer virus does, you could incur a number of other ethical problems - like stealing, harassment, etc.
There could be many reasons. The computer could have a malfunction and accidentally create a virus. Or, a person could create a virus and send it to you through an e-mail, an ad on the internet, etc.
A hidden virus may copy and distribute itself throughout your computer, since most viruses are hidden deep in your computer, it cant do much more than duplicate.
Malicious (evil) people create computer viruses.
Your question is a bit ambiguous, but I'll try to split it into a few sections: Creating a virus isn't unethical, just frowned upon my the majority of society because of the negative connotations given to the term "virus" and "hacker". Distributing a virus isn't unethical, the activation of CERTAIN viruses is unethical. Some viruses can be used to actually help a system. Norton and McAfee employ viruses and virus derivatives to search for certain causes of viruses, etc. Other viruses destroy and manipulate files and THESE are the unethical ones most people talk about. For an example of a helpful virus, think of the code: del *.* This will effectively destroy every file of every type from the computer it is activated on. If you modify the file however, you can help your system like so: del *.jpg.exe This code will destroy every file ending in the extension .jpg.exe. In case you haven't seen this extension often it's because it's used as a primary means of distributing viruses. Only the FINAL extension is shown so most people will see "Awesome Pic.jpg" and open it, not knowing that it's actually a harmful virus program. Hope this helps!
no because a virus con kill your computer
WikiAnswers does not provide information on illegal acts, such as writing computer virus programs.
Computer + virus will give you hacker.
no i have got loads of toolbars and i have not got 1 virus yet just carry on and do it do wot Eva u want with toolbars they wont create virus's
Hacking and virus creations are serious crimes that must be treated just like other criminal offenses.
That would be illegal... we in the Wiki community will not help you break the law !