This is because the option is disabled by default. I find hibernate a useful feature on a laptop as it shuts down the laptop whilst saving the previous session. This enables me to resume my work at a later time.
To enable the hibernate option on Windows 8 and Windows 8.1, follow these steps:
- Go to the desktop of Windows 8
- Click on the battery icon on the bottom right and choose more power options
- On the left menu, click on the link Choose what closing the lid does
- On the next screen click on the link Change settings that are currently unavailable and tick the hibernate checkbox at the bottom of the screen.
Click on the Save changes button.
You will find that the hibernate option will now be available when pressing the power button.