Listen to the Computerworld TechCast: Rootkits. If an illegal hacker wants to do something to your system, such as plant a virus, a Trojan horse program or spyware, he has to gain access to the system ...

Much like in the movie The Matrix, where the world presented to the computer user is not a true representation of what is really going on, a rootkit is a program that can be used to hide files, ...