Windows – Help me find the offending process waking the Windows 7 PC from hibernate every night

hibernatesleepwindows

Recently my Windows 7 64-bit PC has started waking every night from hibernation around 3:30am. I have done the following to try and figure out what is causing the issue with no luck:

  • Examined the Windows Event logs. Nothing is noted

  • Ran powercfg -lastwake and that reports nothing

  • c:\powercfg -lastwake

  • Wake History Count – 1
  • Wake History [0]
  • Wake Source Count – 0

Ran powercfg to find what devices are armed for wake. Interestingly, this reports two items (I've already unchecked the "Allow this device to wake the computer" in device manager): The keyboard and something called the "eHome Infrared Receiver (USBCIR)". This is a desktop PC and it does not have an Infrared received, so I'm not sure what that device is. Suffice to say it does not have the option to "Allow device to wake…" available in Device Manager.

  • C:\powercfg -devicequery wake_armed
  • eHome Infrared Receiver (USBCIR)
  • HID Keyboard Device

My next step is to disable the Keyboard from wake, but I'm not convined that's the problem.

This is on a Dell XPS435 if that helps anyone.

Best Answer

I had the exact problem like the OP, Win7 32Bit, PC hibernation and it woke up at 3:57am precisely every night, but there was nothing noted in the log and the powercfg -lastwake gave no information.

The problem was the Windows Media Center. Once, I even caught it red-handed downloading some updates right after the PC woke up, so I disabled the auto-update in the settings. So when the problem persisted I wasn't thonking of the WMC as the culprid anymore.

But it turned out that even though I turned it off within the WMC, the task within the Task Scheduler was still up and running. To disable the task simply open the Task Scheduler, navigate to Task Scheduler Library\Microsoft\Windows\MediaCenter. There should be the mcupdate_scheduled task. Disable it – problem solved!

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