Technically, creating a virus is not illegal; releasing the virus so that other users can be infected by it is illegal. I know that, but I would like to know some reasons why they are not illegal.
No, unless you coded it and released it to the public.
Yes.
Computer viruses can be enormously damaging to the computer and to the data in the computer. They are far from harmless.
A harmless computer virus is really, just a virus that can not do any harm to your computer. It cannot access any files in your computer an cannot activate anything. All it really does is just sit there.
Sending it to strangers, possibly yes. Sending it to a friend, probably not.
The infect your computer by being undetected by your anti virus and posing as a harmless file.
i believe that it is illegal
opening an email attachment downloading stuff from the internet
You don't INTENTIONALLY put a virus on your computer. Viruses are made by hackers to make money and stuff. Its illegal.
WikiAnswers does not provide information on illegal acts, such as writing computer virus programs.
Tobacco mosaic virus and wheat streak virus are harmless to humans.
Virus can spread by many way, depends on the hacker who made it. Some virus will infect your computer immediately when you visit a website. But some are harmless until you click on file which was infected. There are many type of virus nowadays: trojan, macro, rootkit,....you can find more information on norton, kaspersky site.
Is it illegal to alter the files on your own computer? Is it illegal to create registry entries on your computer? Is it illegal to format your hard drive? The answer is no. Once someone else's property comes into the mix, though, it is illegal.
That would be illegal... we in the Wiki community will not help you break the law !