computer virus

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2. Submitted By
Ariful islam
Id: 16109019
Program: BSAg
Section: day
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3. CONTENTS
 What is virus
 History of virus
 How to spread virus
 What can virus do
 Types of virus
 How do identify virus
 How to protect from virus
 Conclusion
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4. TOPIC : Computer VIRUS
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5. What is virus
 A computer virus is a program or piece of code that is
loaded onto your computer without your knowledge
and runs against your wishes.
 Viruses can also replicate themselves.
All computer viruses are man-made.
 A simple virus that can make a copy
of itself over and over again is
relatively easy to produce.
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6. History of virus
 Since 1987, when a virus inected ARPANET, a large
network used by the Defense Department and many
universities, many antivirus programs have become
available.
 These programs periodically check your computer
system for the best-known types of viruses.
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7. How to spread virus
 Virus spreads through e-mail attachments, portable
devices,websites containing malicious scripts and file
downloads.
 Although the Internet gets a bad rap as a source of
viruses, you’re no more likely to contract a virus from
the Web than you are from packaged software. Still,
scan everything you download, and update your
antivirus software regularly.
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8. What can virus do
 Virus can trick you into buying fake software,steal your
personal information, and use it to get to your money or be
sold on the digital equivalent of the black market.
 Powerful viruses are valuable and potentially lucrative
tools.
 Damage software
 Damage data
 Slow your system
 Can take control
 Steal information
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9. Types of virus
 Adware
 Spyware
 Worms
 Trojan Horse
 Bots
 E-mail virus
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10. Adware: Adware is a form of software that
downloads or displays unwanted ads when a user is
online, collects marketing data and other information
without the user's knowledge or redirects search
requests to certain advertising websites.
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11. Spyware :
Spyware is a general term used to describe software that
performs certain behaviors, generally without
appropriately obtaining your consent first, such as:
 Advertising
 Collecting personal information
 Changing the configuration of
your computer
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12. worm:
This program is very similar to a virus and has the
ability to self-replicate leading to negative effects on
your computer. For example: lovgate.F
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13. Trojans virus:
It can illegally trace important login details of user
online.For example E-Banking is common among
users,therefore,vulnerability of tracing your login
details whenever your PC
is working without any
strong powerful
antivirus installed.
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14. Bots:
 A bot worm is a self-replicating malware program that
resides in current memory (RAM), turns infected
computers into zombies (or bots) and transmits itself
to other computers.
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15. Email virus:
This is a viurs spread via an email.Such a virus will hide
in an email and when the
recipient opens the email.
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16. Conclusion
 I think we should not use the pc without any antivirus
security as it may cause damage to our important data.
 Do not copy or transfer any data or file without
scanning the disk.
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17. Q & A
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18. THANK YOU
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