This document discusses troubleshooting and computer maintenance. It defines troubleshooting as identifying, planning, and resolving problems within software or computer systems. It notes that troubleshooting often involves a process of elimination to determine the root cause of an issue. The document then provides examples of common Windows errors that can be troubleshooted, such as slow performance, freezing, blue screens, and more. It also lists some basic "layman checks" that non-technical users can perform for computer maintenance, such as checking if the power is on, hardware is connected properly, and basic settings.