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PC Guides Security

6 Different Types Of Computer Viruses You Need To Be Careful About

The most common misconception is whatever the malware is present in their computer; people simply take it as a virus. In most cases, it isn’t and surely identifying the malware is important in dealing with it.

So for this, developing an understanding of malware and its infection models is important.

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A virus is a computer malware which enters your system, replicates itself usually damaging files. Since this is the characteristic feature of all biological viruses, the different types of computer virus are named so.

Although worms exhibit similar behavior, a computer virus is more complex and dangerous as they can take down large volumes of data, deleting the earlier files and occupying entire local drive.

Once this happens, retrieval of these so called infected files is also not possible. Hence it is also very important to understand what the different types of computer virus are.

Different Types Of Computer Viruses

These are how all the different types of computer virus can be categorized into,

#1 File Virus

These viruses are common with the executable files i.e. an .exe, .com, .vbs files. If you are running an infected executable file, you really are doing a big mistake!

Once you do this, you are giving it permission to run your computer as they enter your computer’s memory.

Even when you receive e-mails from an un-trusted source containing an executable file, we recommend you not to run such files and get yourself into trouble.

#2 Macro Virus

These viruses are common with the word processing document and other office tools like the Excel, PowerPoint and so on. Once these files are infected, it is almost impossible to recover such files.

#3 Master Boot Record and Boot Sector Virus

The master boot record file viruses are one of the most destructive types of a computer virus. The master boot record is what contains the code about what your computer is to do before your operating system starts up. This is because, though this virus resides on the hard drive, it isn’t in the windows partition.

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This is because, though this virus resides on the hard drive, it isn’t in the windows partition. Due to this reason, you can’t delete this virus by simply re-installing your operating system. Also because they are present in the master boot record, their detection is also difficult.

#4 Multipartite Virus:

These viruses have hybrid nature and affect both the boot sector and program files. Hence are also called the hybrid virus. Since they affect both the areas at a time, multipartite viruses are often considered fast spreading viruses.

These viruses are very tricky and their elimination is difficult. It is because though this virus is cleaned from the infected files, it is confined to the boot sector and again has that chance to spread onto the program files.

Likewise, if you attempt clearing the virus from the boot sector they are still present in the program files and the boot sector can be re-infected. Hence the prevention is the best cure for these viruses.

#5 Polymorphic Virus:

These viruses are a real headache to the antivirus programs. It is because they change their virus signature, i.e. binary pattern every time they make copies of themselves and infects a new file. It affects data types and functions. Because of its nature, it is considered as a complicated virus.

#6 Stealth Virus:

These viruses concentrate mainly on staying undetected. They are capable of altering information about the file they are present in, in the memory.  Their trickery can hide changes which are brought about due to their replication.

These are the different types of computer viruses. Note that the best way to fight viruses is to restrict their entrance into the computer itself. 

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Security

Why is it not good to use two antivirus at the same time ?

Can I have two antiviruses at once? This is one of many recurring questions that come to us. One of the most important thing that a computer user should know is having two active antiviruses at the same time is not suggestable.

In fact, it is a bad idea. Apart from causing a false sense of security, it can cause us different problems in the system.

 

Some of our friends of Kaspersky Lab gave a clear explanation about, why is it not a good idea to have two antivirus solutions simultaneously active. Here’s all about it.

Consequences Of Using Two Antivirus Software Simultaneously

#1 Deadlocked: The antivirus tracks all the applications in the system that are monitored or sending information.

For this reason, an antivirus program that is working (sending and monitoring) will become a malicious software in the eyes of another antivirus program installed on your computer. which will try to block it and remove it.

#2 Fight the virus: When a virus or malware is found, antivirus removes it and leave it in quarantine.If another antivirus program finds the file, even it wants to do the same with him (at the end of the day that’s their job).

Repeatedly sending reports and notifications about a virus that has already been removed. If you do not like to receive, constantly, such messages; then you have a problem.

#3 Resource consumption: An antivirus program needs a lot of memory to analyze the system and perform other operations. If we have two AV programs running at the same time, then the effectiveness of the system will be affected and impaired.

If we have two AV programs running at the same time, then the effectiveness of the system will be affected and impaired.

We recommend you to choose an antivirus that independently tests and have the ability to fight against the latest malicious programs thereby protecting you from any kind of threat.

And in case you want to have a second opinion about the status of your computer, you can use both Antivirus Online or other AntiVirus products specifically designed for this task as being itself ” Kaspersky Security Scan ” with whom you can scan your system without conflicts such as those discussed above.

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PC Hacks Security System Performance

How To Remove Different Viruses Using CMD (Command Prompt) ?

Are you having problems with any of the viruses ? Then we are here to help you out. In most of the cases the antivirus software that is installed in your computer removes the virus, but if the problem persists then here are the methods to remove all that virus manually and easily.

Steps To Remove Virus Using CMD :

Step 1 : Open Command Prompt :

Just Press ” Winkey + R ” and type cmd in the displayed run dialog box.

Step 2 : Move on to the Drive :

Lets us assume that the virus is present in the C drive , If you are in any other directory of C drive like “ C:\Users\ ” then use the DOS command ” cd.. ” until you get ” C:\> ” .

Step 3 : Type The Code :

Now just type ” attrib -h -r -s autorun.inf ” , and then press Enter. Now if there is no virus in there then it will display ” File Not Found -autorun.inf ” , if there’s any virus present then just type ” del autorun.inf ” and press Enter. Follow the same procedure for all other drives and finally scan your computer for virus.

How To Different Remove Viruses Using CMD (Command Prompt) ?

How To Remove The Shortcut Virus Using Command Prompt?

These are the viruses that convert all data in your flash drives or hard drives to shortcuts. Just follow the below given steps to remove any flash drive shortcut virus and get back your files.

Steps To Remove Shortcut Virus From Pendrive :

Step 1 : Open Command Prompt :

Just Press ” Winkey + R ” and type cmd in the displayed run dialog box.

Step 2 : Type The Code :

Move on to your flash drive directory and just type the following command ” del *.lnk ” and then press Enter. Now just type ” attrib -h -r -s /s /d e :\*.* ” and press enter.

Note : If you feel any difficulty in typing the code then just enable the copy-paste mode in your command prompt and just paste it .

How To Restore Or Get Back The Files :

You can retrieve your files by WinRAR .

  • Open WINRAR .
  • Browse to the location of the USB key or the location of the PC folder.
  • Copy and paste the files wherever you want.
  • Format your USB key.

How To Remove The Empty Folder Virus Using Command prompt ?

The flash drive may have some files, but they appear empty! , then this is because of a virus known as Empty folder virus. Follow the steps mentioned below to remove virus folders and recover your files.

Steps To Remove The Empty Folder Virus :

Step 1 : Open Command Prompt :

Just Press ” Winkey + R ” and type cmd in the displayed run dialog box.

Step 2 : Type The Code :

Type the following command line ” attrib -h -r -s /s /d x:*.* “.

Here the element ” x ” should be replaced with the hard disk letter that is assigned to flash drive that is attached into the computer.

How To Different Remove Viruses Using CMD ?

Lets assume that the flash drive shows the alphabet drive as ” M “, then type the following command ” attrib -h -r -s /s /d m:*.* ” and press Enter.