How does a computer viruses spread?

Answer:
Computer viruses usually spread in one of three ways: from removable media; from downloads off the Internet; and from e-mail attachments.
Although the Internet gets a bad rap as a source of viruses, you're no more likely to contract a virus from the Web than you are from packaged software.
First answer by Deathcon007. Last edit by Deathcon007. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 1 [recommend question].