Malware
Software that is intended to damage or disable computers
Examples
Viruses: a device that is capable of copying itself and has a detrimental effect
Trojan Horses: computing a program that is designed to breach the security of a computer system while apparently performing a harmless function
Spyware: software that enables a user to get information about a computer's activities by taking data from their hard drive.
How to Avoid Malware
AntiVirus Software, Firewall, Anti-malware, An updated browser, Common Sense