07-02-2013, 10:30 AM
COMPUTER VIRUS
COMPUTER VIRUS.pptx (Size: 2.19 MB / Downloads: 27)
What Is Virus ?
A computer virus is a computer program that can copy itself and infect a computer without the permission or knowledge of the owner.
One of the first detected virus was the Creeper virus in the early 70’s.
TYPES OF VIRUSES
CREEPER : It was first detected on ARPANET, the forerunner
Of the Internet in the Early 1970s. It was an Experimental
Replicating program written by “BOB THOMAS’’ at BBN
Technologies in 1971.
ELK CLONER : It was the computer virus to appear outside
The single computer or lab where it was created. It was
Created by “RICHARD SKENTRA” in 1981.
TROJAN HORSES : It appears as interesting program file
But when installed it allows intruders to access and read your
File.
WORMS : virus that copies and multiplies itself by using
Computer networks and security flaws.
HOW TO PREVENT VIRUS ?
Upload and use Antivirus Software.
Be aware of the E-mails and attachments you open.
Check for updates on Antivirus software regularly.
Make sure Antivirus software is installed correctly.
HOW DOES A VIRUS WORKS ?
A virus is a Malicious code whose chief purpose is to copy itself and maybe doing something malicious along the way. To do this it needs to, enter in an execution stream. The virus can get itself called by adding a line to configuration script, appending itself to files which are to be opened and maybe processed, or getting a process to run it through an exploit.