Yet computer viruses continue to infect systems on campus. Computer users need to adopt a comprehensive strategy to keep their systems virus free. In addition to installing and using antiviral packages properly, they need to modify both how they use their computers and how they think about computing. A computer virus is a set of programming instructions that attaches itself to a file, application, or some part of the computer's operating system. Once attached, this set of instructions can affect the operation of applications, the integrity of data, or the general functioning of the computer itself, usually in a negative way.
Different viruses do different types of damage.
NVIR, a virus which affects the Macintosh system, causes printing failures and operating system crashes. Computer viruses are most often transferred from computer to computer via infected floppy disks. In general, disks should be write-protected at all times unless the information on the disk is being edited. The first step in a comprehensive antivirus strategy is the use of antiviral software. Whether you have your own computer or use someone else's, make sure that it has antiviral software installed and the system is being checked regularly for viruses.