All of the sudden, my lights and fans go on in my computer. Everything is working as usual. But, it happened again.
It turned in randomly? Check and make sure your power switch cable is plugged into the proper slot on the motherboard. If that still doesn't fix it, I would try unplugging that cable and seeing if it still happens. (You might have a misbehaving power switch in your case)
Use powercfg to see if it's a software problem first.
Open cmd, run
to see what happened. If you want my help with this, just reply what the result is.
EDIT: Actually, I'm too lazy to help, found a guide for you. If you have trouble just let me know though. https://www.howtogeek.com/122954/how-to-prevent-your-computer-from-waking-up-accidentally/
I forgot to say it was sleep mode.
This has happened to me before as well. I put it in sleep mode overnight, then wake up at like 2:00 a.m. with lights on, monitor on, all the things. Hasn't happened in a while but idk why it happens in the first place.
If my cat rubs against my boom arm, it yanks the mouse (Poor man's mouse bungee) and it sometimes turns on because of that movement imput
In addition to what others have mentioned - I know when I put my computer in hibernation, any small bump will power it on, so check if it's actually off vs. hibernation.
Ghost in the Machine
Windows will wake-up at the pre-determined update time to apply updates (usually 3am by default). This only works if the computer is asleep... if it is fully shut-down or in hibernate mode, it will not turn itself on. Even if it's a simple update and doesn't restart it still wakes up to apply the updates. You can of course turn automatic updates off if you wish. So there you have it.
Thank you so much! I tried going into the power plan and disabling the timer settings. I guess I can reenable it and disable automatic update so I’m not turning my computer off at like 12:31.
Well, I realize my power button doesn’t work when this happens. Also, it shows the sign in screen.
And, I have no idea how to disable automatic updates. Is this any good? https://www.youtube.com/watch?v=3rvUGfhiIus