1. Presented By- DISHA PATEL
CLASS – VII-D
ROLL NO.- 13
SUBMITTED TO-
MRS. khusHboO sahai
A
PRESENTATION ON
COMPUTER VIRUS
2. Introduction
How Does It Spread
Symptoms
Prevention
Types Of Computer Virus
Boot Sector Virus
Program File Virus
Multipartite Virus
Macro Virus
Malware
Worm
Spyware
Trojen Horse
Conclusion
3. Computer viruses are a type of software program
that, like a biological virus, reproduces and spreads
itself.
Full Form: Vital Information Resource Under Seizes.
Some virus may display only a message on the
screen, others may slow down the Pc.
They can also erase files or even format your floppy
or hard disk and crash the system.
Creeper Virus: The first detected on APRANET in the
early 1970's.
Popular Viruses: Jerusalem or Israeli Virus, Brain or
Pakistani Virus, April First, Ping Pong or Bouncing
Ball, Stoned, Dark Avengers, Love bug, Ransomware.
4. Computer viruses spread by attaching themselves to other computer
program file.
When you exchange a file or pen drive with a virus, the virus
spreads from one computer to the another.
Viruses also spreads when a Computer Engineer comes to repair your
system and puts his/her diagnostics disks in your PC.
5. Letters looks like they are falling to the bottom of the screen.
The computer system becomes slow.
The size of available free memory reduces.
The hard disk runs out of space.
The computer does not boot.
Fail to print correctly.
Restarts itself often.
6. 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.
On the computer, turn on the firewall.
Keep the computer operating system up to date.
8. Infects the boot or Master Boot record (MBR), contains info about
the drive and the bootstrap loader of diskettes and hard drives
through the sharing of infected disks and pirated software
applications.
Once your hard drive is infected all diskettes that you use in your
computer will be infected.
9. Becomes active when the program file (usually with
extensions BIN, COM, EXE, OVL, DRV) carrying the virus is
opened.
It then makes copies of itself and will infect other programs
on the computer.
10. Hybrid of a Boot Sector and Program viruses.
It infects program files and when the infected
program is active it will affect the boot record.
11. Programmed as a macro embedded in a document, usually
found in Microsoft Word and Excel.
Once it gets in to your computer, every document you
produce will become infected.
Relatively new type of virus and may slip by your antivirus
software if you don't have the most recent version
installed.
12. Malware, short for malicious software, refers to any intrusive
software developed by cybercriminals (often called hackers) to steal
data and damage or destroy computers and computer systems.
Examples of common malware include viruses, worms, Trojan
viruses, spyware, adware, and ransomware.
13. A computer worm is a type of malware whose primary function is
to self-replicate and infect other computers while remaining active
on infected systems. A computer worm duplicates itself to spread
to uninfected computers.
14. Spyware is a type of malicious software -- or malware -- that is
installed on a computing device without the end user's knowledge.
It invades the device, steals sensitive information and internet
usage data, and relays it to advertisers, data firms or external
users.
15. Trojan horse is a program downloaded and installed on a computer
that appears harmless, but is, in fact, malicious. Unexpected
changes to computer settings and unusual activity, even when the
computer should be idle, are strong indications that a Trojan is
residing on a computer.
16. Computer viruses and worms can so easily
be placed into your work station so you
must be careful when going on the
internet, opening emails from unknown
users, make sure you have some kind of
anti-virus software and always get updates
so that you aren't helping to spread viruses
and worms Other people as well as
harming yourself and your pocket.
