Drawing on the latest security information on Windows XP and Windows Vista operating systems, a comprehensive manual indentifies a wide variety of potential threats confronted by home computer users, including viruses, spyware, hackers, identity theft, and more, and offers practical tips on how to respond to such hazards, how to use the operating systems' protection systems, how to keep children from being victimized, and what to do in the event of identity theft. Original. (Beginners)