A presentation on computer viruses was given by Farid uddin bhuiyan. The presentation defined a computer virus as a program that damages computer systems and destroys or erases data files. It described seven common types of computer viruses and explained how viruses work by exploiting vulnerabilities on interconnected systems. Signs of a virus infection were provided, such as unusual screen messages or slowed computer performance. The presentation concluded by recommending ways to prevent virus infections, such as keeping anti-virus software updated weekly and backing up important files.

1. PRESENTATION ON
Computer virus

2. Presented By
Name: Farid uddin bhuiyan
ID: 10112101082
Intake: 24th.

3. What is computer virus?
Computer virus refers to a program which
damages computer systems and destroys or
erases data files.

4. Types of
Computer
Virus:
1.Time Bomb,
2.Logical Bomb,
3.Worm,
4.Boot Sector
Virus,
5.Macros Virus,
6.Script Virus,
7.Trojan Horse.

5. How Computer Viruses Work:
Computer viruses tend to grab our attention. On
the one hand, viruses show us how vulnerable
we are. A properly engineered virus can have an
amazing effect on the worldwide Internet. On
the other hand, they show how sophisticated and
interconnected human beings have become.

6. What are the signs of viruses:
A computer virus can cause unusual screen displays, or
messages - but most don't do that. A virus may slow the
operation of the computer - but many times that doesn't
happen.
Even longer disk activity, or strange hardware
behavior can be caused by legitimate software, harmless
"prank" programs, or by hardware faults. A virus may cause a
drive to be accessed unexpectedly and the drive light to go on
but legitimate programs can do that also.

7. Actions to prevent virus infection:
- Always update your anti-virus software at least weekly.
- Back up your important files and ensure that they can
be restored.
- Change the computer's boot sequence to always start
the PC from its hard drive .

8. Actions to prevent virus infection:
-Don't share Drive C: without a password and without readonly restrictions.
- Empty floppy drives of diskettes before turning on
computers, especially laptops.
- Get trained on your computer's anti-virus
software and use it.

9. 1.BitDefender Antivirus 2013
2. Norton Antivirus 2013
3. Kaspersky Antivirus 2013
4. AVG Antivirus 2013
5. McAfee Antivirus 2013
6. Avira Antivirus 2013
7. ESET Nod32 Antivirus 4

10. Thank You ALL