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1. A PRESENTATION ONCOMPUTER VIRUS PRESENTED BY: MIHIR ROAT
F.Y.B.C.A
2. Flow of contents
Introductionto computer
Introduction to computer viruses ?
Different types of viruses
Causes & effects of computer viruses
Prevention & cure of computer viruses
Conclusion
3. Introductionto 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
4. Introduction to Computer viruses
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
continue 5. Introduction to computerviruses (contd)
The virus affect the pc causing damage to system files, user
data or other function of your computer
Like biological virus this software viruses causes damage
before the victim are aware of its existence
Now we will see the major type of computer viruses & its
effect on our pc
6. Type ofviruses
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.
7. Causes and effects of computer viruses
Computer viruses spread by attaching themselves to the other
computer program files(usually .exe, .com, .bat, .dll, )
A computer virus may be hidden or protected from the users
eye
These viruses spread through infected files in Floppy, Cd, Usb
pen drive & internet
8. Causes & effects of computer viruses
A computerviruses 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
9. 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 diskto boot your pc then write protect
it
Make backups ofyour impotent files in floppy or cd and keep it
in a safe place you will need it later
10. Prevention & cure of computer viruses (contd)
Keep you system secure from viruses by using anti virus
software
Anti virus can scan the infected file in you data and can
repair it.
Keep your anti virus update so it can help you to prevent
unwanted spams and viruses enter your computer through floppy, cd,
usb or internet
11. Some anti viruses software 12. Conclusion
I think we should not use the pc without any antivirus security
as it may causedamage to our important data
Do not copy or transfer any data or file without scanning the
disk
13. Sources
Data referred from pc book
The following are the web site for information on computer
viruses