The payload may disrupt or change data files, display an irrelevant or unwanted message, or cause the operating system to malfunction. Computer viruses activate when the instructions-or executable code-that run programs are opened. Once a virus is active, it may replicate by various means and tries to infect the computer's files or the operating system. For example, it may copy parts of itself to floppy disks, to the computer's hard drive, into legitimate computer programs, or it may attach itself to e-mail messages and spread across computer networks by infecting other shared drives. Infection is much more frequent in PCs than in professional mainframe systems because programs on PCs are exchanged primarily by means of floppy disks, e-mail, or over unregulated computer networks. A computer virus is a relatively small program that attaches itself to data and program files before it delivers its malicious act.
Computer Viruses And Its Effects On A Computer System
Computer Virus Questions And Answers Computer Science Essay | CustomWritings
Please join StudyMode to read the full document. Different Types of Computer Viruses Computer virus is a software program written with malicious intentions. There are number of computer viruses that can impede the functioning of your computer system. Let us find out the different types of computer viruses.
When it comes to cybersecurity, there are few terms with more name recognition than "computer viruses. What follows is a brief history of the computer virus, and what the future holds for this widespread cyber threat. What is a computer virus?
The use of the word was strange. In the digital world, talking about viruses was almost nonsense. The first PC had been launched on the market just two years earlier and only the most technologically informed were running an Apple II computer or one of its early competitors. Skrenta created it as a joke for his friends, whose Apple II computers became infected by inserting a diskette with a game that hid the virus. So, Cohen was not really the first one.