TurnedOnTimesView is a lightweight and user-friendly application designed for Windows that provides detailed insights into your computer's power states. This free tool displays the exact date and time your PC was turned on or off, along with the duration between these events. It categorizes shutdowns by type, such as direct shutdowns or system restarts, and also notes reasons like system errors, making it a valuable resource for diagnosing unexpected shutdown issues.

With no installation required, users can simply launch the application to view a comprehensive list of their PC's recent on and off times. This feature is particularly useful for troubleshooting unexpected shutdowns, helping users identify the last activity before a shutdown. Additionally, it can reveal if unauthorized users have accessed the computer, ensuring better monitoring of system usage.