Hey /g/uys, at night my computer which is off keeps on turning

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Hey /g/uys, at night my computer which is off keeps on turning on for a breif second and closing down. Last night I was sitting at my desk and like clockwork at about 4:10 it flashed its screen on harddrive humming and then immediately shut down like ususal.

I didn't get the best look the screen but it seemed to just be a regular startup screen.

Whats the purpose of this?
Do you think that someone is taking data like a webcam pic, or something like recording its GPS Location. Sending audio files its recorded without my consent?

Maybe its how computers try to get slow over time. Every night a high quality couple gigabite pic it taken and stored on the harddrive, you cant delete. Over years the data of the pictures add up and slow down your computer. I bairly have anything on this labtop and running solidworks is a pain and so laggy. For the most part I never even touch this labtop. Its pretty expensive but struggle to use a 3d software? What do you think is up?