what is a computer virus? Best Tutorial

Hello, friends in this topic we are discussing what is a computer virus and its types. In today’s computer technology virus is a common issue. So we have to know more about viruses to run a computer without any risk. Also, we should have to know how to protect our computers from viruses.

These are the main points we are discussing what is a  computer virus-

The definition of what is a computer virus is a malware program that has the potential to damage a computer system and data. Viruses affect them for no longer use.

After a virus program is entered into a system, it creates similar files itself by customizing more devices programs and alternatively access its programming language.

These languages threaten data or files and if it increases slowly, it may ultimately result in affecting the system. These types of codes are mainly programming to fishing or damage our computer files. The virus can access automatically a device without our permit gain.

And access according to their intention.Computer viruses are huge threats of matter that they may affect our all digital properties loss to the financial every year in our computer

Signs of virus-infected computer

If a computer system is infected with viruses, then there might be different types of viruses, there might be different types of signs. A few normal signs of computer virus effects are given below-

(1) Computer applications are not perfectly running.
(2) Unusual music or sounds unexpectedly run from the speakers.
(3) Unable to print.
(4) Frequent damages to computer devices.
(5) Unreachable disk drivers and disks.
(6) Self-set-up of strange files.
(7) Performing weird acts like password changes, generating strange files, etc.
(8) Continuous pop-up windows.
(9) Delaying in computer functioning.
(10) Automatically deliver mass emails from our profile.
(11) Inboxes and menus are discarded.
(12) More increases on engagements that have lastly opened (ex. gif, jpg, VBS).
(13) Unexpectedly discontinue from computer device without knowingly deleting files which we regularly practice.
(14) Cannot be inserted or operate Antivirus software in our computer.
(15) Converting to our browsers homepage
(16) Unexpectedly damaged or cannot restore the antivirus software.

Types of computer virus

There are many kinds of computer viruses that might be classified just like their base, increasing abilities, cache memory, data they affect, and harmful quality.

Before we discuss the types of viruses, we have to know the first-ever computer virus “Creeper” was an unapproved automatic duplicating program coded by Bob Thomas at BBN Technologies in 1971? We will discuss the history of viruses in the other parts.

The different types of computer viruses are discussed below-

(1) Direct Action Virus

This virus suddenly arrives into the primary storage, affects each program, data, folder specify in the Autoexec.bat path, and later cleans automatically.

It might further, clean the files positioned in hard disk or USB fixed to the computer system. During these viruses are identified in the hard disk’s base record, they have the capacity of altering the position on each elimination.

Many times they don’t destroy computer data but change the device’s complete functions. We might run an antivirus scanner for security. Straight process virus is simple to identify and every affected data might be replaced totally.

It can infect all .exe and .com file extension

Example- VCL.428, created by the Virus Construction Laboratory

(2) Overwrite Virus

Overwrite viruses are more critical. They have infected a large area of operating software along with Windows, DOS, Macintosh, and Linux.

They especially clean the file and restore the previous code automatically. They restore the data beyond altering its range.

It is simple to identify as the primary procedure close functioning. Once the data gets affected, it can’t be restored and you will end up losing all data.

We can secure from this virus by clean each the affected data, so it’s safer to update modern antivirus software when we run the Windows operating system.

Examples- Grog.377, Grog.202/456, Way, Loveletter

(3) Boot Sector Virus

The Boot Sector virus affects the memory systems Master Boot Record (MBR). Each media, even if it is bootable or not might cause this virus.

These viruses can place their code to hard disk’s partition system. It next receives into the primary memory once the device reopens.

Booting issues, insecure computer functions, and failure to detect hard disks are typical problems that can appear later appropriating affected.

After all, it has turn into unique as the failure in floppy disks. Advance operating software set up fixed boot part security that creates it tough to achieve the MBR.

Confirm the disk we are applying is coded securely. Do not boot or reboot the computer system along strange external disks inserted for security.

It can infect all types of data later receiving into the primary storage.

Examples- Form, Disk Killer, Stone virus, Polyboot. B

(4) Directory Virus

Directory Virus (Cluster virus) affects the data by alternating the DOS directory data. DOS points to the virus code alternatively pointing to the original program.

While we run a program, DOS first loads and executes the virus code in advance running the real program code. It turns into more tough to identify the real data later getting affected.

We can install the antivirus to re-scanning the infected data for better security.

It might damage the whole process in the directory.

(5) Web Scripting Virus

A web scripting virus discontinues web browser security and allows coders to write client-side scripting(CSS) toward the web page. They generate much quickly than different ordinary viruses.

It is functioned to affect special sites like social networking, user review, or email. It can deliver a huge amount of threats, junk files, and harm data on an internet server.

We can run malicious software removal tool in Windows to secure our device, harm code languages, functions cookie protection, or insert real-time security software for the internet browser.

It may infect all web pages by inserting special code in the header, footer or root connect file.

Examples- DDos, JS.fornight

(6) Trojan Horse

Trojan Horse (or Trojan) is a non-replicating kind of malware that notices consistently. We might get consistently mislead into loading and executing it on the system.

It can destroy/modify every the data, damage the computer system, create new code, and is powerful sufficient to bring hackers remote connection to our device.

We can install trusty and strong antivirus software and advance it constantly for security.

Examples- Beast, Zeus, ProRat, ZeroAccess, Netbus.

(7) Worm

The worm is the only malware system that duplicates automatically allow to increase for external devices. It depends on channels (mostly emails) and protected ways to trip from a device to another.

Different viruses trouble the internet by duplicating or delivering large files (extra bandwidth), pressuring the hosts to discontinue the server.

We can install antivirus and anti-spyware software for security.

Example- Morris, Nimda, Sober, WANK, Code red, ILOVEYOU.

(8) Polymorphic Virus

The polymorphic virus program automatically functioning different coding keys and methods all time they affect a program or make a duplicate of its own.

By the reason for separate encoding keys, it turns tougher for the antivirus system to detect them. This means it is an automatic programming virus that is structured to reject identify by scanners.

We can install modernized, high-end antivirus for security. It can damage all data.

Examples- Whale, Simile, SMEG engine, 1260

(9) Memory Resident Virus

These viruses approach in main memory (RAM) and start functioned anytime we open our computer system. They attack each data properly functioning on pc.

Normally, it allows memory storage, stops main programs, and automatically manages code during each task is completed.

we can install powerful antivirus software to secure our pc.

It might herm each data functioning on PC and files that are duplicated or converted.
Examples- Randex, Meve, CMJ

(10) FAT Virus

FAT represents a file allocation table that is a part of a memory storage disk that is operated to keep data, like the location of every information, the entire storage memory, free space, used space, etc.

A FAT virus changes the file and creates it useless for the device to store the data. It is strong sufficient to effort us to clean the entire disk.

Reject accessing data from unauthorized sites for security, especially those detected as “attack sites” by browser or search engine. We can insert robust antivirus software for security. Some malware is not Virus but is similarly harmful.

It may harm every data.

Example- The link virus

(11) Macro Virus

There is a little software similar to a word processor which permits a macro program to attach files. This virus is programming in the macro language, that

why it can function itself during the file is accessing and this virus might simply increase to all data of our device.

It is based on the apps alternatively the operating software. They are normally invisible in files that are also similarly connected through email.

We can secure our device through deactivate macros and delete unauthorize emails from strange. Rather than we may insert advanced antivirus system which may identify macro virus simply.

It may harm .mdb, .PPS, .Doc, .XLs files.

Examples- Melissa virus, Bablas, and Concept

(12) Multipartite virus

The Multipartite virus harms and increases in large steps based on the operating software. They especially connect in-memory storage and damage the hard disk.

When it enters into the files, it harms each drive by changing apps, files information. We might shortly see our works slow and minimum virtual memory accessible for utilizer apps.

This virus deletes the boot part and the whole disk advance restoring the files. Reject connections from unauthorized internet sites and insert strong antivirus software for security.

It may herm every data and boot part.

Examples- Invader, Ghostball

(13) Companion Virus

Companion Viruses were more extra while the MS-DOS generation. Alternative normal viruses, do not modify the actual data. It duplicates a document

along a separately modify (usually .com) that functions in the same with the actual data.

The virus can be simply identified by the reason existence of extra .com file. Insert strong antivirus software and reject including a contact of spontaneous emails for security.

For example, if there is a document called abc.exe, this virus will make extra invisible data called abc.com.

And while the program calls a file ‘ABC, the .com (higher priority extension) functioning advance the .exe extension. It may operate malicious processes like cleaning the actual data.

It may infect every .exe data.

Examples- Stator, Terrax.1096

How does a computer get a virus?

Viruses might increase various processes, through the internets, discs, email contacts, or outer memory systems such as USB devices. Following are the main

(1) Inserting free games, toolbars, media players, and various device services.
(2) Allowing illegal email or email contacts.
(3) Inserting essential software apps not carefully study license acknowledging.
(4) Sending music, data, or photos along with various users.
(5) Contacting an unsafe website.

How To Protect Computer from Virus?

(1) Regularly modernize operating software.
(2) Quickly clear messages which identity to be threats.
(3) Download software only from trusted sites.
(4) Bring antispyware software.
(5) We can install antivirus security and a firewall.
(6) Reject suspicious Websites.
(7) Regularly update antivirus security and antispyware software.
(8) Correctly decide in advance for free software and file-sharing apps installing them.
(9) Reject messages from an unauthorized source.
(10) Increase protection of browser security.

How to remove computer viruses?

Antiviruses have created huge advancements in reality capable to find and avoid the increase of computer viruses.

While a system does turn into affected, hard, inserting an antivirus solving is yet our highest chance for clearing it.

Once inserted, the highest software might search for the malicious program. Once located, the antivirus will present options for its clearance.

If this is not something which might be done itself, most of the security vendors offer a technician’s assistance in clearing the virus-free of charge.

What is an Anti-Virus?

Friends, the  main part of our topic what is a computer virus is an anti-virus and its types.

An anti-virus is a software of computer system that includes assembling of programs that might identify and clear every threat and malicious software from computer system.

This anti-virus software is structured in a design that they might identify by the data in a computer system and control the data that are loaded or lightly affected by a virus.

Types of Anti-viruses

So, friends on this topic we have discussed what is a computer virus and its types. These are the main points I want to discuss with you. If you like this topic please share it with your friends and family. Thanks

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