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#1
The image you posted was your computer resuming from a sleep state, not a shutdown. But some things to check (these still apply to Windows 10 even if they say they are for other OSes):
What awoke your computer last? ::Lastwake Command - Windows 7 Help Forums
Prevent devices from waking your computer (specify which ones) ::Devices - Allow or Prevent to Wake Up Computer - Windows 7 Help Forums
Remove wake timers ::Power Options - Add or Remove