How Does a Computer Virus Spread ?
Answer: Computer virus can spread in several ways. Some are explained here: A computer virus begins to work and spread whenever you start up the infected program or application. For example, any word processing application that contains the virus will place the virus in the memory every time the program is run. Once the virus is copied onto the computer memory it may get programmed to attach to other applications, disks or folders. It may also infect a network. These viruses behave in different ways. Some stay active only till the infected application is running. They become inactive when the computer shuts down. Other viruses operate every time you start your computer after they have infected a system file or network.