08-12-2012, 05:03 PM
A PRESENTATION ON COMPUTER VIRUS & ANTIVIRUS
COMPUTER VIRUS.ppt (Size: 1.25 MB / Downloads: 154)
Computer virus concept
What is Computer Virus?
Definition -- Virus: A self-replicating piece of computer code that can partially or fully attach itself to files or applications, and can cause your computer to do something you don't want it to do.
Similarities between biological virus (like " HIV " ) and computer virus:
Need a host for residence.
Capable of self-replicate
Cause damage to the host.
Difference: Computer viruses are created by human.
Introduction to computer
The term computer has been borrowed from compute that means – to calculate
A computer is a device the data input by the user, analyses it & gives a output to the user
In laymen language a computer is a machine which reduces the work load
A computer viruses are a type of software program, like a biological virus
It causes various problems to computer system
like : system failure , display problems , slow down you pc, etc.
The symptoms of pc when it gets infected or virus
Unusual & strange messages
on the computer screen
Type of viruses
There are about millions of viruses present & daily 6 to 7 new viruses are found
The following are the types of viruses:
Resident Viruses, Direct Action Viruses, Overwrite Viruses, Boot-sector Virus, Macro Virus, Directory Virus, Polymorphic Virus, File Infectors, Companion Viruses, FAT Virus, Worms, Trojans or Trojan Horses, Logic Bombs, etc.
Causes & effects of computer viruses
A computer viruses can infect the program and it may lead to loss of important data
These viruses are transfers to our data through any floppy or cd
If any infected file is copy in your system then it will infect the other files and function too
Prevention & cure of computer viruses
Since virus can cause extensive effect to your important files,possible steps must be take to prevent attack on your pc
If you use floppy disk to boot your pc then write protect it
Make backups of your impotent files in floppy or cd and keep it in a safe place you will need it later
Conclusion
I think we should not use the pc without any antivirus security as it may cause damage to our important data
Do not copy or transfer any data or file without scanning the disk