This report provides comprehensive solutions for troubleshooting and maintaining computer systems architecture. It addresses common hardware issues like display, mouse, hard drive, sound, and keyboard problems, offering step-by-step resolutions. Furthermore, it delves into software issues such as slow internet, window server problems, app command failures, network troubleshooting, and computer restarting issues, providing detailed fixes. The report also outlines essential maintenance activities, including disk defragmentation, disk cleanup, data backups, and virus scanning, emphasizing their importance in ensuring optimal system performance and data security. This document serves as a practical guide for diagnosing and resolving various technical challenges in computer systems, promoting efficient maintenance practices.