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I have a Sony Vaio VPCEB24FX laptop that will wake up from hibernation at random times on its own. It will be hours after I put it in hibernation. It has Windows 7 64-bit. I tried the command prompt suggested in other answers but all I get is this message:

Wake History Count - 1

Wake History [0]

Wake Source Count - 0

If I shut down the computer it stays off. As for waking up from "sleep", I don't know because I don't use it; just hibernate.

I noticed this starting right after the first time I used Windows Media Center. I have gone through the program and can't find anything that would wake up the computer from hibernation. It still happens when Media Center is shut down completely.

Edit: I tried the solution in this answer but there isn't an option like that to uncheck. All it has is the following:

enter image description here

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@josh, next time you can also flag the answer as not an answer (clean up both parts) –  soandos Aug 30 '12 at 12:58
    
@soandos OK. I did flag it with a comment. Would "not an answer" be better? –  JoshP Aug 30 '12 at 13:00
    
Yes, but what you did is fine. –  soandos Aug 30 '12 at 13:00
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Welcome to Super User! I merged your two unregistered user accounts. Please consider properly registering with the site, so you can add comments to answers to your question. –  Daniel Beck Aug 30 '12 at 13:22
    
Regarding your edit: We must have different versions. I've updated my answer with a method that relies on the Task Scheduler. –  Dennis Aug 30 '12 at 13:54
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1 Answer

Windows Media Center might be the culprit indeed, since it can wake the computer up to perform scheduled downloads.

How to disable:

  1. Open Windows Media Center.
  2. Enter Settings → General → Automatic Download Options.
  3. Uncheck Wake the computer to run this task.
  4. Click OK.

Another method from SevenForums:

  1. Press Win + R and run taskschd.msc.
  2. In the console tree, enter Task Scheduler Library → Microsoft → Windows → Media Center.
  3. Open mcupdate.
  4. In the Conditions tab, uncheck Wake the computer to run this task.
  5. Click OK.
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