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Best presentation on computer virus

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ABSTRACT:

Computer viruses  poses problems for users of personal computers.These viruses have been from mid 1980s.A computer virus is a special kind of computer program which spreads across disks by making copies of itself.In order to infect a computer the virus should have the chance to execute its code.As long as the computer is infected with virus can copy itself to other files or disks that are accessed.


DEFINITION:A computer virus is a software program with a ability to make copies of itself ,which attacks itself to other applications  or files.

Types of computer Virus.

§ There are three types of computer virus

v Boot virus

v Program virus                                                                

v Micro virus

1. Boot virus:  Boot viruses infects the boot records of hard disk and floppy disks. Generally these are considered more dangerous than program viruses.

2. Program Virus:  These viruses infect program files, which have extensions such as .COM,.EXE.,SYS.,DLL,.OVL, or .SCR. program files are attractive targets for computer virus because they are widely used and have relativity, simple formats to which  viruses can attach themselves.

3. Macro Viruses:  These viruses infects data files. For example, Microsoft word document and template files are susceptible to macro virus attacks they spread rapidly as infected documents are shared on networks or downloaded from internet sites.

Ø A virus tries to take control of computer system it has infected at the first opportunity availible.it makes copies of itself and also try to carry harmful task written in its program. This process can happen so quickly that the user is not even aware of the presence of a virus in his/her computer



Top 5 Sources of Computer Virus Attack:

v The most potent and vulnerable threat of computer users is virus attacks. Virus attacks hampers important work involved with data and documents. It is imperative for every computer user to be aware about the software and programs that can help to protect the personal computers from attacks. One must take every possible measure in order to keep the computer systems free from virus attacks.  The top sources of virus attacks are highlighted below:

Ø Downloadable Programs

Ø Cracked Software

Ø Email Attachments

Ø Internet

Ø Booting From CD



Best antivirus software.

§ Norton antivirus.

§ MacAfee virus scan

§ Kaspersky antivirus
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