... and looks around to see if it can find any other programs on the disk. If it can find one, it modifies it to add the virus's code to the unsuspecting program. Then the virus launches the "real program." The user really has no way to know that the virus ever ran. Unfortunately, Two programs are infected, when the virus reproduced itself. The next time either of those programs gets executed, they infect other programs, and the cycle continues. If a floppy disk, with a virus-infected program is loaded onto another computer, the virus starts spreading very fast. Also any program that the contents is not known and is being downloaded could be a virus. Viruses travel fast using both these ways. The spreading part is the "infection" phase of the virus. Viruses wouldn't be so bad if all they did was replicate themselves, but they don't. Unfortunately, most viruses also ...

See this essay or coursework document in full right now