Diagnostic software is a type of program designed to identify and troubleshoot issues within computer systems or devices. It analyzes hardware and software components, providing users with detailed information about potential problems. This software can help users understand errors, optimize performance, and ensure that systems run smoothly. Many diagnostic tools are available for various platforms, including Windows, macOS, and Linux. Some popular examples include Windows Memory Diagnostic and Disk Utility for macOS. These tools are essential for both everyday users and IT professionals, as they simplify the process of maintaining and repairing technology.