Virus:
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Virus is a malicious software program written
intentionally to enter a computer without user’s permission. It has the ability
to replicate itself.
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Computer virus is a computer program that can
replicate itself.
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It spread from one system to another system.
Depends on nature of virus it may cause damage of your hard disk contents.
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Most of the viruses are targeted only on
Microsoft operating system.
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With use of internet virus will spread easily.
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Almost 30,000 viruses are exists in the
world(Estimated).
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300 viruses are finds in every month.
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C,C++,Cobol, pascal , wba, unix and java script
languages are used for creating the virus.
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87% virus comes through internet only .
Symptoms of virus:
The following all are the symptoms when your system has
virus:
1. Computer runs slower.
2. Computer no longer boots up.
3. Computer screen sometimes flicker.
4. Computer crashes without any reason.
5. Computer files disappear.
6. Annoying messages appear.
7. Reduce your system memory.
8. Modification of data.
9. Files damaged.
10. Hard drive
erased.
Ways to catch a
computer virus:
From Floppy Disks: Virus
attaches from floppy disks also, be
careful to put floppy disk from one computer to another computer.
From the Internet: Most
of the virus attaches from internet only. Virus wont attach when you browsing
internet. If you download and install anything then only virus will attach.
From Email: From
email you send and receive messages not a problem . If you send emails through
attachments and .exe files then virus will attach.
From a computer
network: If Group of computer network linked to your
computer for sharing information then your system has a possibility to attach
virus.
Safe computing
practices:
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Use Anti -virus software whichever is good in
the market.
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Scan your computer on a regular basis.
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Update your antivirus software on regular basis.
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You have to take back up once in a month.
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You should scan the downloaded files.
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You have to scan all email attachments.
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Beware of email attachments from unknown sources
end in .vbs or.js
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Run only necessary software s in your system.
Types of Malware:
Malware simply means malicious software. It can be remove by
using malware tools or anti malware.
The following are the malware virus types:
1.Trojan horse
2.Worms
3.Rootkits
4.Spyware
5.Dialers
6.Keyloggers
7.Hijackers
8.Crimeware
9.Adware
Worms:
It is self replicating.
It utilizes a computer network to send replicas of itself to
connecting computer on that network.
Create a volume and it poses a great threat to large
computer networks.
Remove by using malware removed tools.
Trojan horse:
It is a form of compute malware that can be installed on a
computer system.
It is a form of free useful software to the user.
If once installed in your system, it gives access to hackers
through remote station.
Remove this either manually or antivirus.
Spyware:
It is a form of malware program installed secretly on a
computer that collects and sends information about its usage and personal data
to the developer.
Remove this by using antivirus.
Adware:
This is advertisement supported software.
It is designed to display advertisements on computer system.
Crimeware:
This is specially for crime on the internet.
The main aim is to steal financial and confidential
information such as credit card details and soon.
Keyloggers:
This is created to monitor user keystrokes and the
information are logged and reported to the person are used by organizations to
monitor workers or employees activities.
Hijackers:
This is a form of malware that changes the browser setting
of user’s computer and redirected to the developers choice or redirected to for
paid advertising.
With this your computer will be slow and your browser will
crash.
