The Hiberfil.sys hidden system file is located in the root folder of the drive where the operating system is installed. The Windows Kernel Power Manager reserves this file when you install Windows. The size of this file is approximately equal to how much random access memory (RAM) is installed on the computer.To make hibernation unavailable, follow these steps:

1. Press the Windows button on the keyboard to open Start menu or Start screen.
2. Search for cmd. In the search results list, right-click Command Prompt, and then click Run as Administrator.
3. When you are prompted by User Account Control, click Continue.
4. At the command prompt, type powercfg.exe /hibernate off, and then press Enter.
5. Type exit, and then press Enter to close the Command Prompt window.

To make hibernation available, follow these steps:

1. Press the Windows button on the keyboard to open Start menu or Start screen.
2. Search for cmd. In the search results list, right-click Command Prompt, and then click Run as Administrator.
3. When you are prompted by User Account Control, click Continue.
4. At the command prompt, type powercfg.exe /hibernate on, and then press Enter.

5. Type exit, and then press Enter to close the Command Prompt window.

   dir /a c:\