The document discusses computer viruses, including their types, how to detect them, and how to eliminate them. It describes three main types of computer viruses: system/boot record viruses that attack parts of the computer used to run programs, file viruses that attach to program files, and some common virus names. It lists symptoms of a computer virus infection like programs taking longer to load or less memory available. It recommends using antivirus software like McAfee or Norton and firewalls to detect and eliminate viruses.