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I recently installed Windows 8 RTM, but found a very annoying thing. My PC always powered on automatically even in midnight. Eventually I noticed that I can power on the PC by pressing keyboard or mouse, and even moving mouse.

After searched this in Google, I turned off Sleep and Hibernate in Power Options -> System Settings -> Shutdown settings, but it still did not work.

Would anyone please help me? I don't want to suffer from the noise of PC powering on in midnight any more.

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Please do not include the answer into your question, I will fix this for you ;) – Baarn Sep 1 '12 at 8:28
up vote 6 down vote accepted

Try this:

  1. Control Panel > Mouse > Hardware > Properties > Change Settings > Power Management and uncheck "Allow this device to wake the computer".
  2. Control Panel > Keyboard > Hardware > Properties > Change Settings > Power Management and uncheck "Allow this device to wake the computer".
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Thank you very much, gordoco, it works now :) – Shinbo Sep 1 '12 at 8:21

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