Some users have very useful Hibernate option in their systems. But in Windows 8 / 8.1 computer systems, the Hibernate option is not available in power menu. If you want to enable the Hibernate Mode Option in Windows 8 / 8.1, follow these simple instructions:
Press Windows + R key to get "RUN" dialog box then type "powercfg.cpl" and press Enter. It will open Power Option Window.
Find "Choose what power buttons do" option on left panel of Power Option Window.
Then click on "Change settings that are currently unavailable".
Now scroll down, there you can able to see "Hibernate" option. Tick to enable it.
And "Save changes". Now "Hibernate" will be visible.