Besides, use Powercfg command to check this issue. To do that, refer to the steps below:
1. Click the Start Button, type "cmd" (without quotation marks), right click on the "Cmd.exe" in the search result list and select "Run as administrator".
2. Type "powercfg -devicequery wake_armed" (without quotation marks) in the open window and press Enter Key.
3. A list of the configured devices to wake the computer will be received, then please type the following command to disable them one by one and see if the culprit can be found. (We may test the result after disabling each device.)
Powercfg -devicedisablewake "devicename"
Note: "devicename" is a device name listed as a result of running the first command.
For example, if the network card "Broadcom NetXtreme Gigabit Ethernet" is listed, we can type the following command to disable it and press Enter.