What can I do if my computer cannot wake up after sleep in Windows 7/8?

Some friends who use the Windows 7 system project may find that they leave the computer and find that the computer is sleeping. We cannot wake it up with the mouse or keyboard, let me solve this bug for you.

Update driver

1. Make sure that the hardware driver is upgraded to the latest version. We can use Windows Update. Start-> inSearch for programs and filesEnter Windows Update-> press enter in the box.
   
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2. PressCheck for updatesStart check. If you have a new hardware driver, it will remind you to install it.
   
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3. You can also download the driver from the website of the computer hardware manufacturer and manually install it one by one.

Collapse the image. Expand the image and check whether the hardware is supported.

1. Start-> inSearch programs and file boxesEnter cmd-> press Enter.
   
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2. A command dialog box is displayed. Enter powercfg-a and press Enter.
   
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3. Let's take a look at the running results:
   
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4. Let's explain the above result. Shown hereStandby (S3)This indicates that your machine supports sleep.
5. If your hardware does not support sleep, you may need to contact your computer vendor to upgrade the BIOS. By the way, most of the new computer hardware can basically meet the computer sleep requirements.

Hide this picture. Expand this picture to check which devices can wake up the computer.

1. If the command window is closed, open it. Start-> inSearch for programs and filesIn the box, press cmd-> enter.
2. Press PowerCfg-DEVICEQUERY wake_armed and press Enter.
   
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3. Let's take a look at the running results:
   
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4. Let's explain the above result. In the current situation, there are two machines that can be awakened. We use A and B to mark them. A is A mouse device, indicating that the mouse can wake up the machine. B is a network card, indicating that the machine can also wake up from the Network (this is generally used only in the company environment ).
5. If the mouse device is not listed, you cannot wake up the machine with the mouse. We need to enable the wake-up function (continue to read the following content ).

Hide this image. Expand this image to enable the device's wake-up function.

1. Start-> inSearch programs and file boxesEnter "Device Manager"-> enter.
   
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2. After the Device Manager is enabled, a series of devices are listed. Find a corresponding item and right-click it.Attribute.
   
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3. Click to openPower ManagementTab, hook upAllow this device to wake up the computer, And then pressOKExit.
   
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