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An operating system coordinates the activities of computer hardware
It is a destructive virus that rewrites itself and is an executable program with its own code. It usually destroys the program it infects.
Operating system
A program that appears to be legitimate but is designed to have destructive effects, as to data residing in the computer onto which the program was loaded.
The special instructions that control the activities of a computer are called programs. A program is a series of instructions written in a way the computer understands.
your mom over your shoulder
device driver
That's a 'key-logger' program.
executable program
A function instructs the Word program to perform a specific task.
Instruction down to hardware level break down toOpcode ( Operation Code ) followed by Operands ( Data onto which such operation is to be performed )Collection/Series of these Opcode + Operands help in performing a particular task - Thus a small Program is created.
If the program is a virus, it is intended to harm your computer, make your computer a zombi or to gather your personal data from your computer for criminal use.