From schiffer.tech
DefShutdown is a shutdown software that forces your device to turn off straightaway.
After launching DefShutdown, it will force your device to turn off after six hours of running.

You can manually extend the shutdown countdown for an hour by clicking the taskbar icon once.
To lower the countdown press the middle button instead of a left click.

Requires Windows XP or newer
You can download it here: DefShutdown - Defensive shutdown - schiffer.tech

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