Hibernate screensaver will hibernate your computer after 2 minutes from startup. It can be very useful if you want to save energy or just have your computer turn off for when it is not being used (silence and no energy consumption). It displays number of seconds left to hibernation. You can terminate the countdown by deactivating screensaver.
Note: you will need to have hibernation option enabled on the system, otherwise Hibernate Screensaver will only switch your computer into standby mode.
How to enable hibernation?
1) Go to the Control Panel and click “Power Options” icon:
2) Select “Hibernate” tab and check “Enable hibernation” checkbox:
3) Click “ok” button.