PC Wouldn't Sleep ( ver: XP, Vista, 7 )

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If your PC won't stay asleep it's often because a device is configured to bring it out of standby when triggered.

• Identify the culprit by pressing the Windows key and [R],
• type "cmd" and
• press [Enter].

Now press the Windows key and [R] again, but this time type "devmgmt.msc" to open Device Manager. Find any devices listed earlier,

• Type the following line and press [Enter]: powercfg –devicequery wake_armed
• Then double-click them and look for an Advanced or Power Management tab.
• Check if the device is allowed to bring the PC out of standby – if it is, untick all the boxes that wake it.
• Click OK,
• Close Device Manager and test it worked;
• Repeat the process if necessary.

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