First of all, sleep and hibernation mean the same thing. Secondly, even if the hard disk shutdown time does not match your computer shutdown time, you'd better set it to "never". Because sometimes the computer program will randomly call the hard disk, which may cause your computer to shut down at a random time instead of a fixed time.
In addition to the above settings, you can also adjust the following settings:
- Go back to the "Advanced Power Settings" mentioned in the first reply and check if there is "Sleep"-"Allow Hybrid Sleep". If so, disable it.
- Press "win + R" and enter CMD. Then press "Ctrl + Shift + Enter" at the same time to open CMD with administrator privileges. Enter the following command and press "enter" to run. powercfg /h off
Now you can check again whether the computer will shut down automatically.
Best Regards,
Raylan-MSFT | Microsoft Community Support Specialist