Antivirus
Computer viruses are small software programs or code that replicates itself and spreads from one computer to another to interfere with computer operation. During the early days of the Internet, most viruses simply deleted files from the computer or did some sort of damage to the operating. Today, most malware is created to steal information, such as passwords, credit card numbers and banking information. It may even erase everything on hard disk. The most common ways malware spreads itself to other network devices is by attachments in email messages and instant messaging messages. It may also exploit un-patched security holes in operating systems to infect computers without any user intervention at all. Computer can be hidden in illicit software or other files or programs one might download from the Internet. Antivirus software is a program specifically designed to protect computers from all kind of viruses harmful to a computer system. It also gives protection against malicious