People, not computers, create computer threats. Computer predators victimize others for their own gain.  Give a predator access to the internet — and to your PC — and the threat they pose to your security increases exponentially. Computer hackers are unauthorized users who break into computer systems in  order to steal, change or destroy information, often by installing dangerous malware without your knowledge or consent. The clever tactics and detailed technical knowledge help them access the information you really don’t want them to have.