What is auto hibernate

[FrankEwins]

Hello,
My laptop started randomly going into hibernation 'preparing to hibernate'. Although this appears to have stopped it now only runs for approx 30 minutes then just switches off. Bottom left hand corner of laptop seems to get pretty hot too. Can you advise or explain please?

 

[WR2]

Sounds like a power saving option to send the laptop to hibernate after a period of inactivity.
You can adjust your power settings through Control Panel.
Look for the Power Options.