This technique can shave off your start up time.
This is a little different from the regular hibernate feature.
Fast Startup offers a freshly-started Windows, just more quickly.

hey read these considerations to decide whether to start it or not before starting.
How to Enable or Disable Fast Startup Windows 10
Step 1.
Right-clickStartmenu to openPower User Menu Optionsand selectPower Options.

Then clickChoose what the power buttons doin it.
Step 2Change prefs that are currently unavailableto make the Fast Startup option available for configuration.
At bottom of the window and you will seeTurn on fast startup (recommended).

Just check on the box to enable Fast Startup Windows 10 or uncheck to disable it.
If you dont see the option, it means hibernation is not enabled on your box.
In this case, you should probably open Command Prompt and punch in:powercfg / hibernate on.
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RepeatStep 1toStep 3to continue.
Dont know how to fix the issue of computer turns on by itself.
This post shows you 5 fixes to PC turns on by itself.