Presentation by Bisma khan class VIBWhite house grammer school,karachi.
What is computer virus ?Types of computer virus?What a computer virus do?•Prevention from computer virusBest antivirus software.
A computer virus is a softwareprogram with a ability to make copiesof itself ,which attacks itself to otherapplications or files.
There are three types of computer virusBootvirusProgram virusMicro virus
Boot viruses infects the boot records ofhard disk and floppy disks.generallyThese are considered more dangerousthan program viruses.
these viruses infects program files,whic-h have extensions such as.COM,.EXE.,SYS.,DLL,.OVL, or.SCR.program files are attractivetargets for computer virus becausethey are widely used and haverelativity,simple formates to whichviruses can attach themselves.
These viruses infects data files.forexample,microsoft,word document andtemplate files are suspectible to macrovirus attacks they spread rapidly asinfected documents are shared onnetworks or downloaded from internetsites.
a virus tries to take control of computersystem it has infected at the firstoppurtunity availible.it makes copiesof itself and also try to carry harmfultask written in its program.this processcan happen so quicly that the user isnot even aware of the presense of avirus in his/her computer.
Norton antivirus is a product of symanteccorporation.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)
McAfee, Inc. is an antivirus software and computer security companyheadquartered in Santa Clara, California.It markets McAfee VirusScan and relatedsecurity products and services, including the IntruShield, Entercept, and Foundstone brands. ...
Kespersky is product of kaspersky lab,A russian computer security company,•Co-founded by natalya kasperskyantivirus,do the following things•Invites virus scan by opening thekaspersky antivirus window.