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Computer randomly turning on.

Last response: in Motherboards
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July 28, 2013 12:41:14 AM

Today I took apart my PC and finally put the SSD in it's spot which can only be accessed when the motherboard is removed, so I took it apart and reinstalled everything but now my computer is turning if the mouse is moved or keyboard is touched. All after a full shutdown. I haven't changed any settings but this just started happening. Any ideas?

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a b V Motherboard
July 28, 2013 2:54:28 AM

If when plugging cords back into your computer after working inside of it, you managed to plug a USB keyboard or mouse into a different USB port on the computer than the one which it was initially plugged in to, it will be seen as a new device and power management settings for the keyboard or mouse will be set to default. Each USB plug will cause the device to be redetected and installed, unless your USB device has been used with that plug at least once before.

If you open a command window in Windows, you can ask the power management which devices are set to wake the computer from sleep.

In Windows, press Windows + R, type cmd.exe, and click Ok. At the command prompt type, powercfg /devicequery wake_armed and press Enter.

Knowing what devices are set to wake the computer from sleep, you can open Device Manager and change their power management settings.

To open Device Manager you can press Windows + R, type devmgmt.msc, and click Ok.

In Device Manager, expand the category pertaining to the device you wish to modify the power settings for, then double left mouse-click the specific device. You may have to look at the properties of multiple devices to find which one is enabled to wake the computer from sleep.

After opening the Properties dialog for the device, click on the Power Management tab. On the Power Management tab, remove the check from the box labeled, "Allow this device to wake the computer".

Repeat the process for any remaining devices you wish to prevent from waking your computer.
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July 28, 2013 7:55:22 PM

bigpinkdragon286 said:
If when plugging cords back into your computer after working inside of it, you managed to plug a USB keyboard or mouse into a different USB port on the computer than the one which it was initially plugged in to, it will be seen as a new device and power management settings for the keyboard or mouse will be set to default. Each USB plug will cause the device to be redetected and installed, unless your USB device has been used with that plug at least once before.

If you open a command window in Windows, you can ask the power management which devices are set to wake the computer from sleep.

In Windows, press Windows + R, type cmd.exe, and click Ok. At the command prompt type, powercfg /devicequery wake_armed and press Enter.

Knowing what devices are set to wake the computer from sleep, you can open Device Manager and change their power management settings.

To open Device Manager you can press Windows + R, type devmgmt.msc, and click Ok.

In Device Manager, expand the category pertaining to the device you wish to modify the power settings for, then double left mouse-click the specific device. You may have to look at the properties of multiple devices to find which one is enabled to wake the computer from sleep.

After opening the Properties dialog for the device, click on the Power Management tab. On the Power Management tab, remove the check from the box labeled, "Allow this device to wake the computer".

Repeat the process for any remaining devices you wish to prevent from waking your computer.


Thank you! This worked perfectly

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a b V Motherboard
July 29, 2013 11:21:23 AM

You're very welcome! Always happy to pass on knowledge where I can. :-)
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