This manual serves equally well as a teaching guide for CompTIA's A+ Core Hardware Exam and as a useful general reference for the PC hardware technician. A thorough guide, it examines the basic components of computer hardware systems, as well as upgrading and troubleshooting computers. An easy-to-read approach is applied to the discussions of each primary component so that readers learn how each component functions, along with the key installation and troubleshooting tips related to that component. Detailed coverage also explores moving and storing data, networking computers, and remote communications.