Windows logs every system state change in the background. You don’t need third-party software to see your PC On Off Time; you just need to know where to look.
Check Event ID 1 (Sleep Entry) and Event ID 42 (Sleep Exit) with powercfg -waketimers. Most likely: a network adapter set to wake on LAN, or a scheduled task. PC On Off Time
Your PC might turn on at 2 AM due to scheduled tasks (Windows Update, maintenance). To stop this: Windows logs every system state change in the background
Then check powercfg -lastwake in CMD to find the culprit. Then check powercfg -lastwake in CMD to find the culprit
If your PC On Off Time log shows late-night usage you’d like to prevent, schedule auto shutdowns:
Other shutdown commands: