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CONTENTS What is Virus ? Types of computer viruses. How Does a Computer Get a Virus? Symptoms of a computer virus. Some new Computer Viruses. Worms. How

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Page 1: CONTENTS What is Virus ? Types of computer viruses. How Does a Computer Get a Virus? Symptoms of a computer virus. Some new Computer Viruses. Worms. How
Page 2: CONTENTS What is Virus ? Types of computer viruses. How Does a Computer Get a Virus? Symptoms of a computer virus. Some new Computer Viruses. Worms. How

CONTENTS

• What is Virus ?• Types of computer viruses.• How Does a Computer Get a

Virus?• Symptoms of a computer

virus.• Some new Computer

Viruses.• Worms.• How a virus spread via

network ?• Trojan Horse.• Difference Between a Virus,

Worm and Trojan Horse.

Page 3: CONTENTS What is Virus ? Types of computer viruses. How Does a Computer Get a Virus? Symptoms of a computer virus. Some new Computer Viruses. Worms. How

What is Virus ?

“A virus is a program or piece of code that is loaded onto your computer without your knowledge and runs against your wishes.”

Page 4: CONTENTS What is Virus ? Types of computer viruses. How Does a Computer Get a Virus? Symptoms of a computer virus. Some new Computer Viruses. Worms. How

Types of computer viruses

Boot viruses

Program viruses

Multipartite viruses

Stealth viruses

Polymorphic viruses

Macro viruses

Page 5: CONTENTS What is Virus ? Types of computer viruses. How Does a Computer Get a Virus? Symptoms of a computer virus. Some new Computer Viruses. Worms. How

How Does a Computer Get a Virus?

• On downloading files from the Internet.

• On opening an e-mail attachment.

• On copying programs or files from any other infected computer.

Page 6: CONTENTS What is Virus ? Types of computer viruses. How Does a Computer Get a Virus? Symptoms of a computer virus. Some new Computer Viruses. Worms. How

Symptoms of a computer virus

• The computer runs slower than usual.

• The computer crashes, and then it restarts every few minutes.

• Applications on the computer do not work correctly.

• Disks or disk drives are inaccessible.

• You see unusual error messages.

• An antivirus program cannot be installed on the computer, or the antivirus program will not run.

• New icons appear on the desktop that you did not put.

Page 7: CONTENTS What is Virus ? Types of computer viruses. How Does a Computer Get a Virus? Symptoms of a computer virus. Some new Computer Viruses. Worms. How

Some new Computer Viruses

• OPRAH WINFREY VIRUS

• RIGHT TO LIFE VIRUS

• MARIO CUOMO VIRUS

• TED TURNER VIRUS

Page 8: CONTENTS What is Virus ? Types of computer viruses. How Does a Computer Get a Virus? Symptoms of a computer virus. Some new Computer Viruses. Worms. How

Worms

These viruses spread via computer networks. It is self replicating computer program.

Page 9: CONTENTS What is Virus ? Types of computer viruses. How Does a Computer Get a Virus? Symptoms of a computer virus. Some new Computer Viruses. Worms. How

How a virus spread via network ?

Page 10: CONTENTS What is Virus ? Types of computer viruses. How Does a Computer Get a Virus? Symptoms of a computer virus. Some new Computer Viruses. Worms. How

Trojan Horse

A Trojan virus is one that opens your computer up to malicious users allowing them to read your files.

Page 11: CONTENTS What is Virus ? Types of computer viruses. How Does a Computer Get a Virus? Symptoms of a computer virus. Some new Computer Viruses. Worms. How

Difference Between a Virus, Worm and Trojan Horse

• Virus cannot replicate themselves but worm and trojan can do that.

• A virus cannot be spread without a human action such as running an infected file or program but worm and trojan have the capabilities to spread themselves automatically from computer to computer through network connetion.

• A virus do not consume system memory but worm consumes too much system memory and network bandwidth because of their copying nature.

• Trojans are used by malicious users to access your computer information but viruses and worms can’t do so, they simply infect your computer.

Page 12: CONTENTS What is Virus ? Types of computer viruses. How Does a Computer Get a Virus? Symptoms of a computer virus. Some new Computer Viruses. Worms. How

CONCLUSION:

Through this whole research I come to this conclusion that computer virus is a program which is intentionally generated to destroy & corrupt the files and programs of computer systems. There are many types of computer viruses. The only counter measure to save the computer from virus is to install latest antivirus software.

Page 13: CONTENTS What is Virus ? Types of computer viruses. How Does a Computer Get a Virus? Symptoms of a computer virus. Some new Computer Viruses. Worms. How
Page 14: CONTENTS What is Virus ? Types of computer viruses. How Does a Computer Get a Virus? Symptoms of a computer virus. Some new Computer Viruses. Worms. How

Thank you