Disable Wake Up Option for a Device in Windows Vista

Windows Vista can put your computer into Sleep instead of turning it off. Sleep is a power-saving state. Sleep saves all open documents and programs, and allows the computer to quickly resume full-power operation when you want to start working again. Windows allows some devices other than the power button to wake up the computer from sleep. But you can disable the wake up option for a device if you want. Here is how :

First of all we have to find out which devices can wake up your computer. This is a very easy task.

  1. Press the key combination Windows Key + R to open the Run dialog.
  2. Type cmd in the Run dialog and press Enter. This would open the command prompt window.
  3. In the command prompt window type the following and press Enter :
    powercfg -devicequery wake_armed

    Find out devices which can wake up your computer

  4. Note down the devices. These devices can wake up your computer from a sleep state.

Now we can disable these devices if we want. You must have administrator level access to perform the following steps.

  1. Press the key combination Windows Key + R to open the Run dialog.
  2. Type devmgmt.msc in the Run dialog and press Enter.
  3. In the Device Manager, select the device from the list and double click on it.
  4. In the Properties window for the selected device, select the Power Management tab.
  5. Un-check the checkbox labeled Allow this device to wake up the computer as shown.

    Disable wake up option for a device

  6. Click OK to save the settings.
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