Basics of Computer Virus (Agami best computer training center Institute in Tangail)

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A virus is a computer code or program, which is capable of affecting your computer data badly by corrupting or destroying them.

The computer virus has the tendency to make its duplicate copies at a swift pace, and also spread it across every folder and damage the data of your computer system.

A computer virus is actually a malicious software program or "malware" that, when infecting your system, replicates itself by modifying other computer programs and inserting its own code.

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Types of Virus

Following are the major types of computer virus −

Worms

This is a computer program that replicates itself at a swift pace. Unlike a computer virus, it is self-contained and hence does not need to be part of another program to propagate itself.

Trojan Horse

A Trojan Horse is also a sort of destructive program that remains disguised in a normal software program. It is not exactly a virus, as it cannot replicate itself. However, there is a possibility that virus program may remain concealed in the Trojan Horse.

Bombs

It is similar to Trojan Horse, but Logic bombs have some specialty; these include a timing device and hence it will go off only at a particular date and time.

How Does Virus Affect?

Let us discuss in what ways a virus can affect your computer system. The ways are mentioned below −

• By downloading files from the Internet.
• During the removable of media or drives.
• Through pen drive.
• Through e-mail attachments.
• Through unpatched software & services.
• Through unprotected or poor administrator passwords.

Impact of Virus

Let us now see the impact of the virus on your computer system −

• Disrupts the normal functionality of the respective computer system.
• Disrupts system network use.
• Modifies the configuration setting of the system.
• Destructs data.
• Disrupts computer network resources.
• Destructs of confidential data.

Virus Detection

The most fundamental method of detection of viruses is to check the functionality of your computer system; a virus affected computer does not take command properly.

However, if there is antivirus software in your computer system, then it can easily check programs and files on a system for virus signatures.

Virus Preventive Measures

Let us now see the different virus preventive measures. A computer system can be protected from the virus through the following −

• Installation of effective antivirus software.
• Patching up the operating system.
• Patching up the client software.
• Putting highly secured Passwords.
• Use of Firewalls.

Most Effective Antivirus

Following are the most popular and effective antivirus from which you can choose one for your personal computer −

• McAfee Antivirus Plus
• Symantec Norton Antivirus
• Avast Pro Antivirus
• Bitdefender Antivirus Plus
• Kaspersky Anti-Virus
• Avira Antivirus
• Webroot Secure Anywhere Antivirus
• Emsisoft Anti-Malware
• Quick Heal Antivirus
• ESET NOD32 Antivirus