Types of computer viruses

COMPUTER VIRUSES :-

   A computer virus is software program designed by some notorious persons which used for destructive purposes. Computer viruses can produce a variety of symptoms on your computer. Some viruses multiply without causing obvious changes.More malicious strains can issue random sounds or greet you with unexpected screen messages. In extreme cases,viruses can damage files and hard disk. Computer viruses are hiding program. A virus enters into the machine through an infected floppy or internet program. 

    Types of viruses :- 

           Viruses are generally classified into two categories .

1. BOOT SECTOR VIRUS 
2. FILE VIRUS 

          The boot sector viruses reside in the boot sector of the disk and spread by copying onto boot sector of all the floppies used on the machine.

         A file virus infects only executable files those with extension.EXE,.COM and. SYS. 

ANTI VIRUS :-

       Anti-virus includes protects your computer from viruses by scanning your computer's memory and Disk drives. Viruses can be detected and removed by using anti-virus programa.

             Some anti virus programs are :-

• TREND PC - CILIN

• NORTON 2002

• MCAFEE 

• AVG etc