In Hibernation Mode, the Current state of the computer is saved to disk, and the computer is completely turned off. When a computer resumes from hibernation, it reads the saved state data and restores the system to the same state. Programs that were open are restarted and network connections are restored without you losing any kind of data that you left opened (saved or unsaved).
1. Go to Start--> Settings--> Control Panel.
2. Select the Power Options Icon
3. Click on the Hibernation icon
4. Uncheck Enable Hibernation
Click here to see How To Enable Hibernation In Windows 7