What Is A Computer Virus ? Causes of Computer Virus ? Types of Computer Virus
What Is A Computer Virus? A Computer Virus is a malicious software program “Malware” that can infect a computer by modifying or deleting data files, boot sector of a hard disk drive or causes a software program to work in an unexpected manner”. A computer virus resides on a host computer and can replicate itself when executed. Virus can steal user data, delete or modify files & documents, records keystrokes & web sessions of a user. It can also steal or damage hard disk space, it can slowdown CPU processing. Activation of Virus When the computer virus starts working, it is called the activation of virus. A virus normally runs all the time in the computer. Different viruses are activated in different ways. Many viruses are activated on a certain data. For example, a popular virus “Friday, the 13 th ” is activated only if the date is 13 and the day is Friday. According to Wikipedia “Computer viruses cause billions of dollars’ worth of economic damage each year, due to causing...