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Computer virus

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  • 1. Presentation by Maunishka Malhotra VII-B G.D. GOENKA SCHOOL, ROHINI-22
  • 2. INTRODUCTION TO COMPUTER VIRUS What is computer virus ? Types of computer virus? What a computer virus do? •Prevention from computer virus Best antivirus software.
  • 3. What is computer virus? A computer virus is a software program with a ability to make copies of itself ,which attacks itself to other applications or files.
  • 4. T H E R E A R E T H R E E T Y P E S O F C O M P U T E R V I R U S BOOT VIRUS PROGRAM VIRUS MICRO VIRUS Types of computervirus.
  • 5. Boot viruses infects the boot records of hard disk and floppy disks.generally These are considered more dangerous than program viruses.
  • 6. these viruses infects program files,whic -h 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 formates to which viruses can attach themselves.
  • 7. These viruses infects data files.for example,microsoft,word document and template files are suspectible to macro virus attacks they spread rapidly as infected documents are shared on networks or downloaded from internet sites. Macro viruses
  • 8. What a computer virus do? a virus tries to take control of computer system it has infected at the first oppurtunity availible.it makes copies of itself and also try to carry harmful task written in its program.this process can happen so quicly that the user is not even aware of the presense of a virus in his/her computer.
  • 9. BEST ANTIVIRUS SOFTWARE. Nortion antivirus. Mcaffee virus scan Kaspersky antivirus
  • 10. Norton antivirus is a product of symantec corporation.founded in 1982. Notion check the following program •Boot record s •Programs(at the time you used them) •All local hard drives, •Files download from internet, •Usbs(when in use)
  • 11. Kaspersky ANTIVIRUS Kespersky is product of kaspersky lab, A russian computer security company, •Co-founded by natalya kaspersky antivirus,do the following things •Invites virus scan by opening the kaspersky antivirus window.
  • 12. THANK YOU