Computer Turning on Seemingly at Random

frying_pan_cat, like you checked in device manager for your mouse do the same for your network card. I had this and despite changing bios settings I ended up having to tell the network card not to wake the computer via device manager. I don't understand it exactly, but it was like it was treating any packet that headed it's way as a WOL packet, as opposed to just the magic packet that it should look out for. Hasn't been a problem for me since.
 
As far as the computer turning on randomly at night. Take a look at Task Scheduler and look at what tasks Microsoft have set to run during the night. I found 3 or 4 unnecessary ones that would turn my computer on during the night when in sleep. You can either disable them or change the trigger to user log on or something if you think they are important.

Computer instantly turning on when put into sleep mode is the sign of Wake on Lan being annoying. Go into device manager locate all the network devicese. Right click on each one and go into properties and disable everything to do with Wake on Lan. Other wise any time your router sends any data to your computer it will turn on again.
 
frying_pan_cat, like you checked in device manager for your mouse do the same for your network card. I had this and despite changing bios settings I ended up having to tell the network card not to wake the computer via device manager. I don't understand it exactly, but it was like it was treating any packet that headed it's way as a WOL packet, as opposed to just the magic packet that it should look out for. Hasn't been a problem for me since.

As far as the computer turning on randomly at night. Take a look at Task Scheduler and look at what tasks Microsoft have set to run during the night. I found 3 or 4 unnecessary ones that would turn my computer on during the night when in sleep. You can either disable them or change the trigger to user log on or something if you think they are important.

Computer instantly turning on when put into sleep mode is the sign of Wake on Lan being annoying. Go into device manager locate all the network devicese. Right click on each one and go into properties and disable everything to do with Wake on Lan. Other wise any time your router sends any data to your computer it will turn on again.

I have checked in Device Manager for the network devices and they both have WOL disabled. Is there anywhere else I could look for WOL?

As far as Scheduled tasks go I have had a look and there seem to be multiple tasks scheduled to run at night. Is there any way to change the triggers on all of them or will I have to do them all manually. Also does anyone know why there may be so many tasks scheduled to run at night as I've never had this problem before?
 
I just disabled the scheduled tasks I didn't want manually and that sorted out the problem for me.

Did you go into the advanced tab of the network configuration and disable Wake on Magic packet, Wake on pattern match?
 
I just disabled the scheduled tasks I didn't want manually and that sorted out the problem for me.

Did you go into the advanced tab of the network configuration and disable Wake on Magic packet, Wake on pattern match?

I didn't see the Wake on Magic Packet option before but I've disabled that now so I'll see if that helps.

I will go through the scheduled tasks and disable them later as I can't be bothered now
 
I've been having the same problem recently on Windows 7 Ultimate x64, with Abit IP35 Pro XE mobo. I've turned off 'allow this device to wake the computer' for the mouse and keyboard, will report back if it works.
 
I just unplug the fr****** things at night. The poltergeists can't do their evil things with no power and it saves the environment too.;)

I usually do but on occasion that I don't it gets annoying. Also it does it in the day when I'm not here and I don't want to be unplugging it every time I leave.

I've been having the same problem recently on Windows 7 Ultimate x64, with Abit IP35 Pro XE mobo. I've turned off 'allow this device to wake the computer' for the mouse and keyboard, will report back if it works.

When I did this it still happened but I have now turned off the Wake on Magic Packet setting as well and it hasn't done it again yet (only one night that it hasn't done it but fingers crossed)
 
Confirming that disabling 'allow device to turn on computer' for mouse and keyboard didn't help, my pc turned on at 5am, turned it off, turned on again within a minute..
 
Confirming that disabling 'allow device to turn on computer' for mouse and keyboard didn't help, my pc turned on at 5am, turned it off, turned on again within a minute..

In device manager if you right click on your network adapter and go to properties then go to the advanced tab there's a box headed properties. If you go to the bottom of that list and click on Wake-Up Capabilities the drop down box on the right will probably have wake on magic packet or similar as the option selected. I have changed it to none which seems to have worked for me so far but the problem was intermittent so I can't say for sure if it's worked but you should give it a go and see if it helps
 
I had a problem like this on one of my pc's, though mine was turning off at random too, which turned out to be a faulty power switch on the case.

Might be worth disconnecting the power switch just to prove a point after power down / hibernating the pc??
 
Mine turned on again last night. It just sits at the login screen with the monitor off, when I log in there's literally nothing going on. Going to try disabling keyboard, mouse and wifi adapter from Device Manager one at a time/night..
 
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