Malware is shorthand for malicious software. It is software developed by cyber attackers with the intention of gaining access or causing damage to a computer or network, often while the victim remains oblivious to the fact there's been a compromise. A common alternative description of malware is 'computer virus' -- although are big differences between these types malicious programs. Cyber attacks and malware are one of the biggest threats on the internet. Learn about the different types of malware - and how to avoid falling victim to attacks.