WHAT IS VIRUS ? A Virus is a program created by programmers which is used to infect the Operating System. After the virus code is written, it is buried within an existing program and once that program is loaded into the computer, the virus replicates by attaching copies of itself to other programs in the system. Viruses are merely found in the network environment. Virus is just like that illness for a computer.Think that what happen when you are ill, that your body functions are not working properly.As same Computer Virus is also do the same things with it. The term 'computer virus' was first formally defined by Fred Cohen in 1983. They are always indu...