COMPUTER VIRUS

Computer  Virus is a computer program which spreads by inserting copies of itself into other programs or files so as to prevent the computer from working normally.

               Types of Computer Virus

1.    Boot sector virus

2.    Stealth virus

3.    Executable file virus

4.    Macro virus

5.    Polymorphic virus

6.    Multipartite virus

                    Examples of Computer Virus

1.    Trojan horse virus

2.    Sleep virus

3.    Logic bomb virus

4.    Storm virus etc.

                    Sources of computer virus

1.    Infected storage device

2.    E-mail attachments

3.    Internet downloads

Virus Warning Signs

1.  Pop-up window attack

2.  Corruption of system set-up instructions

3.  Apperance of tiny dots

4.  Incomplete saving of files

5.  Slow performance of the computer


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