computer Virus

ASHISHAJIMAL

XI-A

Introduction To Computer VirusesI. Different Types Of Malware

II.Virus Sources

III.How Viruses Act

IV.How Boot Sector Viruses Spread

V. How Viruses Activate

VI.What Are The Sign Of Viruses

VII.What To Do When You Find Viruses

VIII.How To Protect From Viruses

Different Anti-virus Programs

Top Seven Anti Viral Programs

Problems Due To Viruses

20 Most Accessed Virus Description During Last 30 Days

Conclusion

The person might have a computer virus infection when the computer start acting differently.For instance getting slow or when they turn on the computer it says that all the data are erased or something else abnormal has happened.

Malware is a general

name for all programs

that are harmful;

viruses,trojan,worms

and all other similar

programs.

Different Types of Malware

Worms

Trojan

Viruses

Worms.ppt

Trojan Horses.ppt

viruses.ppt

Viruses does not just appear, there is always somebody who has made it and they have own reason to so.Viruses are written everywhere in the world.

Most of the writers are young men.There are also few university students, professors, computer store managers, writers and even a doctor has written a virus.

Main mission of viruses is to spread out and then get active.Then it hack into user account and sent data to its owner or slow that machine.

A computer is infected with boot sector virus if it is booted from an infected disk.These viruses spread normally via floppy disks.

1• Unsolicited

demonstration disks

2• Brand-new software

3• Repaired hardware

When viruses activate they do very different things.Might show abnormal text,format hard disk or do changes to files. There is also talk that viruses have

done something to hardware like hard disk.Viruses can not do any harm to hardware but they can do harm to programs and for example to BIOS so that computer does not start after that.

What are the signs of viruses

Almost anything odd a computer may do,can blamed on a computer "virus" especially if no other explanation can readily be found.A computer virus can cause unusual

screen displays, or messages - but most don't do that. A virus may slow the operation of a computer - but many times that doesn't happen. Even longer disk activity, or strange hardware behavior can be caused by legitimate software or harmless "prank" programs.

An Example Of Error Message Due To Virus

What to do when you find viruses

Make sure that it is virus and what virus it is.It is important to know what kind of virus you are dealing with.Companies that make anti-virus programs know what different viruses do and you can go to their web pages and read about the virus. In some cases it is not good to start

your computer from hard disk, because the virus may active and then do some harm.

The best way to protect your computer is to use updated anti-virus program. One can protect the computer against boot

sector viruses by setting the BIOS to start from a hard disk rather than from a floppy disk. Write protection is a good way to prohibit

against viruses. Write protection works well in Windows NT and UNIX but not that well in Windows and Windows95.

There are three different kind of anti-viral packages: activity monitors, authentication or change-detection software, and scanners. Each type has its own strengths and weaknesses. Commercial anti-viral programs have a combination of the above mentioned functions.

Kaspersky Antivirus

Data Fellows F-Plot

Mcafee Antivirus

Symantec Norton Antivirus

Bit Defender 2010

Quick Heal Antivirus

ESaSS ThunderBYTE

The Problems Due to Viruses

Computer viruses are a problem all over the world. More than 1,672,846 people per month have accessed Data Fellows, a company that makes anti-virus program F-Plot. Today's most common virus is the

macro virus.Last month there were 3100 Cap macro virus accesses during the last 30 days in Data Fellows. Next common virus was “Join” with 1171 accesses and third common was Pen pal Greetings with 895 accesses.

9%

21%

16%

12%

42%

Data Fellows had 1,672,846 accesses per month,averaging 55,751 accesses per day

Finland 9%

USA 21%

Brazil 16%

USR 12%

Other Countries 42%

There are lots of viruses in the world and new viruses are coming up every day. There are new anti-virus programs and techniques developed too. It is good to be aware of viruses and other malware and it is cheaper to protect you environment from them rather then being sorry.

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FILE DIRECTORY

C:\Program Files\VIRUS BROWSE


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SELECT A TYPE :

ONE

TWO

THREE

VIRUS

TROJAN HORSE

LOVEBUG

IN STOCK

OUT OF STOCK

OUT OF STOCK


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INSTALLING VIRUS (1)


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SELECT A TYPE :

ONE

TWO

THREE

VIRUS

TROJAN HORSE

LOVEBUG

OUT OF STOCK

IN STOCK

OUT OF STOCK


NEXTBACK



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SELECT A TYPE :

ONE

TWO

THREE

VIRUS

TROJAN HORSE

LOVEBUG

OUT OF STOCK

OUT OF STOCK

IN STOCK


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