PC boots up automatically after shut down

[Zoom7000]

Since upgrading to Windows 10. I notice that every morning, my PC is automatically booted up. Now, I wouldn't really mind this, but the issue is that it's causing my broom cupboard office to turn in to a blast furnace! I've also noticed the fans always seem to be on high after upgrading to Windows 10, but maybe that's because the office is so hot from the PC running all night! I decided to shut it down early one night before leaving and noticed that it automatically booted itself back up after a minute or 2. Last night, I shut it off 5 minutes early and did some paper work and it didn't boot back up, but I came in this morning and it was booted up again.

 

I've done a bit of searching and everything seems to point to disabling Fast Startup. I've done this, but it is still booting up automatically. It's a stand alone PC so it wouldn't be any Wake on LAN scripts waking it up. It wasn't behaving like this with Windows 8.1. It's only started doing it since it upgraded the PC to Windows 10.

 

Any ideas?

Edited September 30, 2015 by Zoom7000

[Patrick]

Funny you say this, my home windows 10 PC seems to start itself up after shut down. Sometimes I wake up in the middle of the night and the thing is on, and I can hear the HDD going along. It's a non domain PC and I think it might be windows updates triggering it. Can't really be bothered to sort it after a long day of sorting other peoples computers.. : \

[Davit2005]

I think running sfc /scannow used to fix this in previous windows systems.