*For screenshots of step by steps, take a look at reference links
To enable hibernate in windows 7:
- Click start and type: power options in search box and hit enter
- Select Change when the computer sleeps and click Change advanced power settings
- In Power options window, expand Allow hybrid sleep and switch to off and click ok
Reference
How to automate hibernate in windows 7:
- open control panel
- click power options
- select plan you are using and click on Change Plan settings
- In editing mode of power plan, click Change Advanced Power setting
- In the power options settings window, expand sleep option and select Hibernate after
- Choose the amount of minutes to wait before device hibernates
Reference