This report provides an analysis of computer architecture and operating systems, focusing on the selection of appropriate hardware components for two distinct user scenarios: a desktop for personal and light use, and a system for professional video editing. The report details the rationale behind choosing specific CPUs, motherboards, RAM, non-volatile storage solutions (including hard drives and NAS), input/output devices (keyboards, mice, and speakers), graphics cards, power supplies, and monitors for each scenario. It evaluates the cost of each component and provides a comparative analysis of the total system cost for both scenarios. The report covers the fundamental concepts of computer architecture and operating systems, and the selection of appropriate hardware based on the user needs. The report concludes by summarizing the key findings and emphasizing the importance of understanding these concepts for both personal and professional applications.