This book focuses on the methods and skills of assembling a computer, including the performance index and classification of hardware, the current mainstream hardware brands and purchase suggestions, the preparation work before assembling a computer, the methods of assembling a computer, installing an operating system, installing peripherals and their drivers, setting up CMOS, and the analysis and troubleshooting methods of common computer failures. In addition, it also explains the use of popular test software and related disk cleaning tools. Starting with the understanding of computer hardware, this book introduces in detail all aspects involved in computer selection, assembly and troubleshooting, and is equipped with the latest pictures, which is very readable and operable. Audience: This book is written for ordinary users, paying attention to basics and practicality. It can be used as a self-study tutorial for beginners and a teaching material for various computer training courses.