What is virus definition in computer?

A computer virus is a malicious piece of computer code designed to spread from device to device. A subset of malware, these self-copying threats are usually designed to damage a device or steal data. Think of a biological virus – the kind that makes you sick.

What are the three types of computer viruses?

The three types of computer viruses

• Macro viruses – The largest of the three virus types, macro viruses use built-in programming scripts that are found in Excel or Word to automate tasks.
• Boot record infectors – Boot viruses, or system viruses, attack programs found on floppy and hard disks.

What is a simple definition of a virus?

A virus is an infectious agent that can only replicate within a host organism. Viruses can infect a variety of living organisms, including bacteria, plants, and animals. Viruses are so small that a microscope is necessary to visualize them, and they have a very simple structure.

What is virus full form?

The full meaning of the virus is Vital Information Resources Under Siege.

What are the 10 types of computer virus?

Types of Computer Viruses

• Macro Virus. This type of computer virus is normally found in Microsoft Office programs.
• Boot Sector Virus.
• Trojan Horses.
• Overwrite Virus.
• Browser Hijacker.
• Web Scripting Virus.
• Polymorphic Virus.
• Resident Virus.

What is virus in computer Javatpoint?

Computer viruses are unwanted software programs or pieces of code that interfere with the functioning of the computer. They spread through contaminated files, data, and insecure networks.

What is a computer virus?

Definition of ‘Computer Virus’ Definition: A computer virus is a malicious software program loaded onto a user’s computer without the user’s knowledge and performs malicious actions. Description: The term ‘computer virus’ was first formally defined by Fred Cohen in 1983. Computer viruses never occur naturally.

What is an antivirus and how does it work?

Once installed on a computer, an antivirus monitors, detects, and cleans any computer viruses by looking for virus signatures. The recommended method of detecting and cleaning the computer from any computer viruses or other malware is an antivirus or antimalware protection program. What are the currently available antivirus programs?

How do I know if I have a virus on my computer?

A sudden change of processing speed could signal that your computer has a virus. Unknown programs that start up when you turn on your computer. You may become aware of the unfamiliar program when you start your computer. Or you might notice it by checking your computer’s list of active applications.

What is the difference between a virus and malware?

The terms “virus” and “malware” are often used interchangeably, but they’re not the same thing. While a computer virus is a type of malware, not all malware are computer viruses. The easiest way to differentiate computer viruses from other forms of malware is to think about viruses in biological terms. Take the flu virus, for example.