Windows 10 – Laptop Wakes Up from Sleep Every Several Hours

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!

I was having this exact same problem on my custom PC build. After entering sleep mode my computer would wake up, seemingly on its own, after a random amount of time. Sometimes it would stay asleep for hours and sometimes it would only stay asleep for a couple minutes.

I had already tried disabling the option of "Allow wake timers".

The Event Viewer and powercfg lastwake were both reporting that the "Power Button" was the cause of my computer resuming from sleep mode. After some reading of various forum and blog posts, it was suggested to try disabling "Wake On LAN" on my network card.

I followed this guide on how to do it:

• open Device Manager
• right-click on your Network Adapter, open Properties
• go to the Power Management tab
• uncheck the "Allow this device to wake the computer" option
  • alternatively, you can check the "Only allow a magic packet ..." option

I haven't experience another sudden awakening since I disabled this "feature".