If the Hiberfil.sys file located on your local hard is growing quite large it might be time to reset the Hiberfile.sys file to default. This is also handy if you find your machine is not functioning correctly after a Hibernate then it indicates that there may be a corruption inside the Hiberfile.sys file. 

Step One::

Click on Start -> Inside the search field type on CMD -> Right click on cmd.exe and choose Run as Administrator. 
Step Two::
Enter in the following command powercfg -h off -> Press Enter
Restart the computer

Step Three::

Once the machine is turned back on open Command Prompt as admin again and enter in powercfg -h on