Thank you for your question and reaching out. I can understand you are having query\issues related to hibernation.
When you choose to hibernate, the operating system copies all of the RAM data to a single file on the disc (in Windows, this file is hidden and called hiberfil.sys)*. The standard shutdown process then continues.
It looks for the aforementioned file when you turn it on again. If the file is there, you have hibernated your computer, in which case the OS copies its contents directly to RAM.
-> When a hibernate request is made, the following steps occur as the system enters hibernation:
Apps and services are notified
Drivers are notified
User and system state is saved to disk in a compressed format
Firmware is notified
-> Resuming from hibernation
When a system resumes from hibernation.
When a system is powered on, the following steps occur as the system resumes from hibernation:
System memory is decompressed and restored from the hibernation file
Drivers are restored to the state they were in prior to hibernation
Services are restored to the state they were in prior to hibernation
System becomes available for login
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