Hibernate is a power option function that exist in windows operating system which will take a snap shot of all your current session that includes all your running programs, open files, etc. and save all the information in the hard drive in a file called hiberfil.sys particularly in C: drive. Hibernate speedups shutdowns and restarts and save power on laptops.
To activate hibernate
1. go to power options
2. choose any of the power plan option and choose the advance setting
3. Under sleep option change the allow hybrid sleep and hibernate after to enable the hibernate funtion in windows OS
Alternatively, you can type in the command "powercfg.exe -h on" at a command prompt with administrative privileges to enable hibernate function.
To disable, type “powercfg.exe -h off” without quotes.