To make hibernation unavailable, follow these steps:

  Click Start, and then type cmd in the Start Search box.
  In the search results list, right-click Command Prompt, and then click Run as Administrator.
  When you are prompted by User Account Control, click Continue.
  At the command prompt, type powercfg.exe /hibernate off, and then press Enter.
  Type exit, and then press Enter to close the Command Prompt window.

To make hibernation available, follow these steps:

  Click Start, and then type cmd in the Start Search box.
  In the search results list, right-click Command Prompt, and then click Run as Administrator.
  When you are prompted by User Account Control, click Continue.
  At the command prompt, type powercfg.exe /hibernate on, and then press Enter.
  Type exit, and then press Enter to close the Command Prompt window.