The most important step-by-step guide to building your own computer is from planning to completion. Building your own computer is not what you need or want to do. It takes some time, planning and careful thought, and isn't always the best way to buy a new computer within your budget. However, if you want to experience deep satisfaction, save money, learn more about how computers work, and prepare to solve hardware problems in the future, we recommend that everyone do it. If you need to build your first computer or replace an old one, this guide is for first-time developers and takes you through everything from planning your system to installing components and adding the software you need.