c) Zombie computer refers to computer or personal computer (PC) connected to the Internet and taken over by a computer worm, virus, or other ‘malware’.
a) Groups of such machines, called botnets (from a combination of robot and network), often carry out criminal actions without their owners’ detecting any unusual activity.
d) Over time, however, most zombie computers accumulate so much malware that they become unusable by their owners.
b) The only cure for heavily infected machines is to completely erase the hard drive and reinstall the operating system.
