08-08-2012, 02:31 PM
WHAT IS A COMPUTER VIRUS
A Computer Virus is a software program with a ability to produce or clone or itself . It may or may not damaged data or other programs . A virus cannot do anything which is not retain in its program it is the intennectual creation of a human computer programmer , just like your word processing program .But a program is not a virus unless it has this ability to replicate .
We know that the computer virus are software programs they written as “C” or “C++” language according to CVIA (computer virus industries association) ,the computer virus are mainly divided into three categories :-
1) BOOT SECTOR VIRUS:-
Boot Sector infectors travel on a floppy disk and gain control of operating system by attaching to the boot sectors of disks.
2) SYSTEM INFECTOR VIRUS:-
System infectors viruses with the system files such as COMMAND .COM that remain memory resident. They gain control bootable floppy that contain the appropriate system files .Memory resident program (also called TSR’s- terminate and stay resident ) are prime candidates for infection by this type of virus .
3)GENERAL EXECUTIVE PROGRAM INFECTORS VIRUS :-
This class of viruses is the most dangerous from an infection stand point , since these viruses can spread to almost executable program in any system. It infects. COM or .EXE