About a week ago my computer started to turning on just after going into sleep mode.

I've checked common settings related to this problem, such as keyboard / mouse energy settings as well as media server. They all are turned off, making sure that they aren't allowed to wake my computer.

However, even when unplugging all devices and internet, this problem still occurs. I have run powercfg -energy raport and when mouse is unplugged, it does not show any problems. I just don't know what is going on and why computer suddenly started to make this problem... do you have any idea what to do?

  • This could be a screen saver issue or a background process... Does the issue happen in safe mode? – Dave Sep 19 '13 at 8:28
  • link1 , link2 – golimar Sep 19 '13 at 8:29
  • @DaveRook: I can't go to sleep mode while in safe mode, there is no button in menu. Golimar - I've already read these topics – Adam W Sep 19 '13 at 8:36
  • I can only assume you've got a program running. Can you try MSCONFIG and remove all programs which are safe to remove and see if this alters the behavoiur. Also, see if anythying is in your Task Scheudler. – Dave Sep 19 '13 at 8:44
  • So the Windows event viewer is telling my that unkown device was the source of wake up. I checked autorun, scheduled tasks and everything is normal as it was in the past when sleep was working correctly. – Adam W Sep 19 '13 at 9:08

I have a batch file with the following commands which i run in these circumstances:

powercfg -devicequery wake_armed 
powercfg -requests
powercfg -lastwake

powercfg -devicequery wake_armed shows you which devices can wake up your computer.

powercfg -requests shows you which processes can prevent your computer from going to sleep. (only this one needs admin rights)

And the last one, the most important for you, powercfg -lastwake shows you the device/process which waked up your computer.

I have a process which wakes up my computer in the morning and it shows:

Wake History Count - 1
Wake History [0]
  Wake Source Count - 1
  Wake Source [0]
    Type: Wake Timer
    Owner: [PROCESS] \Device\HarddiskVolume4\WakeupOnStandBy\wosb.exe
  • 'devicequery wake_armed' show nothing. '-requests' shows that there aren't any processes preventing my pc from sleep. 'lastwake' is only showing numbers :( – Adam W Sep 20 '13 at 16:13
  • Then you should still do a powercfg -lastwake after the next time the computer wakes up on its own. It still can be a process instead of a device. – Rik Sep 20 '13 at 16:14
  • I've edited comment right after you have posted this. – Adam W Sep 20 '13 at 16:16
  • What numbers do you get with -lastwake ? – Rik Sep 20 '13 at 16:16
  • I've got Windows in Polish, so I'm not sure if this is correct: "Wake history count: 1; Wake history [0]; wake source count - 0" – Adam W Sep 20 '13 at 16:18

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