Pc: On Off Time

Windows does not display a simple "total uptime" clock by default, but multiple built‑in tools provide this information.

This is almost always Fast Startup. The system writes kernel memory to disk, then loads it back, making boot seem instantaneous. To see true on/off times, disable Fast Startup: Control Panel > Power Options > Choose what power buttons do > Change settings unavailable > Uncheck "Turn on fast startup". PC On Off Time

Leaving a gaming PC running 24/7 can cost over $200 a year in electricity. By analyzing your On/Off patterns, you can set up intelligent hibernation schedules. Windows does not display a simple "total uptime"

Does your PC restart at 3:00 AM every night? Logs showing unexpected shutdown times often indicate overheating, failing power supplies, or blue screen errors (BSOD). Knowing the exact timestamp of a shutdown helps you correlate events in the Event Viewer. Click OK

Interpreting the List:
If you see a 6006 followed later by a 6005, that window was a clean shutdown and restart.
If you see a 6005 without a prior 6006, the PC either crashed or lost power.