Learning Resources
 

Virus

Virus
A computer virus is small block of coded instructions to obtain control of PC’s CPU and directs it to perform unusual and often destructive actions. They are of types -

  • BOOT INFECTORS
  • SYSTEM INFECTORS
  • GENERAL EXECUTABLE PROGRAM INFECTORS

WORMS
A worm is a destructive program that is designed to adulterate database either all at once or over a period of time. It is very similar to the logic bomb.


HOW DO VIRUSES SPREAD?
Viruses spread through floppies, e-mails, Internet downloads and other networks.

PREVENTIVE MEASURES AND TREATMENT
There are various things one can do to prevent viral infection in a computer system. These are

  • Sharing of software so as to limit the information flow.
  • Limit transitivity
  • Limit functionality
  • Use the scanner and virus remover
  • Observe whether the working of computer system is slowing down
  • Watch for unusually large sizes on program files
  • Watch for unusual displays on the computer screen
  • Make sure that there is virus protection software on local hosts, application and file servers.