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Possible Duplicate:
Windows 7 PC no longers goes into power saving mode

I have a windows 7 x64 machine which is scheduled to go to sleep after a certain amount of inactivity. Recently it has stopped going to sleep when it is supposed to be.

How can I troubleshoot this and find out what is stopping it going to sleep?

Is there some application I can run which will tell me which app is denying sleep?

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@TomWij, troubleshooting tag? Really? isn't that a meta tag? – Sam Holder Aug 12 '10 at 12:41
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No, then [windows-7] would be one too. The content of the question requests troubleshooting and it doesn't mean different things to different people... – Tom Wijsman Aug 12 '10 at 13:25
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closed as exact duplicate by techie007, Mehper C. Palavuzlar, Tom Wijsman, random♦ Aug 12 '10 at 17:02

This question covers exactly the same ground as earlier questions on this topic; its answers may be merged with another identical question. See the FAQ for guidance on how to improve it.

1 Answer

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You could use the command powercfg (command line) that is available in Vista and Windows 7. See this technet article about troubleshooting power management using the powercfg tool.

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