Features of computer virus

 Virus

Q1. what is a computer virus? 

 Ans:-The full name of the virus is Vital Information Resource Under Size. Viruses are small programs on computers. Which are auto-execute programs that affect the functioning of the computer by entering the computer. Are called viruses.

History:-

The term virus in the computer was first used by Cochin, a student at the University of California in his research paper. This was reflected in this research paper. How to write a program that enters the computer and affects its functioning. Just as the virus enters the human body. affects the functioning of the human body. In 1980, no one knew about the virus. 

The C Brain virus:-

The modern virus is called C Brain VIRUS. It's built-in 1986 by two Pakistani brothers Bastan Amjad. Both of them used to trade computer software. C Brain virus did huge damage in the world. Many viruses were produced after this. Which are different ways. 

The symptoms of the C Brain virus.

1. Prevent the program from running.
2. Deletes the necessary information in the computer.
3. Computer speed slows down.
4. Formats the disk.
5. In this, the size of the file is more or less.
6. Creates files and folders and creates his shortcut.
7. The function of the keyboard changes.
8. Useless information starts coming on the screen.
9. Reduce computer memory.
10. The computer starts restarting.

Reasons for spreading the virus:-

1. From Internet:-Now a day internet is considered as the main carrier of virus manufacturers use the internet to spread the virus which is a simple and easy medium.
2. With Network:-Due to a virus coming in on a computer in the computer network the virus spreads in the entire computer of the entire network.
3. By using stolen or fake software:-The software is obtained illegally. It is called pirated bolivares. It can be a software virus.
4. From CD and pen drive:-To copy data from one computer to another, use CD or PAN drive. Due to which the fear of spreading the virus remains.The computer from which the data is being copied. And if it has a virus, the virus spreads to another computer as a wall.

Type of virus:-

Viruses have been classified into several categories based on their function and theory. Which is as follows.

• File virus:-These viruses affect the functioning of the computer by connecting with the files being. Processed.
• Bool sector virus:-This virus is saved in the boot sector of the disk. And when the computer is started. So this prevents the computer from starting. And computers interfere with work. These are very dangerous viruses. 
• Partition table virus:-This virus damages the partition table of the disk. There is no lost data. This reduces the capacity of RAM. And input and output devices so the problem.
• Polymorphic virus:-This virus has the ability to replace itself repeatedly. So that it keeps itself on the computer for many days. And damage the computer. And they are difficult to detect. Because it happens in a completely new form every time.
• Stealth virus:-This virus keeps trying to hide its identity according to its name. And harm the computer.
• Macro virus:-It damages specific types of files. This damages the data of ms office files. And it is hidden as a Meco program. Following is the introduction of some important viruses. Following is the introduction of some important viruses.

Following is the introduction of some important viruses:-

• Michael Angelo Virus:-This virus damages the computer on March 5, the birthday of Michal Angelo. Most computers in the world remain closed on this day. This virus only works for one day. And causes great harm to the computer.
• Disk washer: - This virus removes the data by formatting the disk.  And later leaves a message.  Disk washer with Love got its name based on its message.
  
• Companions: - This virus connects with executable files.  And runs itself in place of files, which leads to dangerous results.
  
• Trojans: - This is a program that claims to do some useful and beneficial work.  And when the object is executed, it damages the head.  Some of these types of viruses do not do their job of getting infected but are activated after a particular date.  And damage the computer.  Such as formatting a hard disk.
  
• Email Hoaxes - This virus is a virus sent with the help of e-mail, it informs the user about the virus.  And it asks its friends to inform.  While nothing like this actually happens, this virus wastes the user's time and mentally troubleshoots them.
  
• Worms: - Wom is similar in type to a virus.  Because it also has the ability to double itself like a virus.  But it does not restrict executable files.  It tries to fill the hard disk faster by repeating its code faster.
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