For that, from System Configuration Startup tab and Services tab, enable one application and service at a time and narrow down your search to identifying the problematic application or service. If your system wakes up from sleep normally, then it is time to check one by one which application or service is causing the issue.

Now check if the problem is resolved or not. If the problem does not persist in clean boot state, it confirms any one of your program or service is causing the issue.

Start Windows OS in a Clean Boot State would help you determine if the problem cause by any third party application or service. Check the option: “ Allow this device to wake the computer”. To resume Windows 8 without Password after Sleep mode At first, Press the shortcut (Windows key + W) to highlight settings search.Right click the Mice or Keyboard and click Properties.In Device Manager, look for Mice and Keyboard (Select One by One not at a time).Press Windows + X and select Device Manager from the list.You can adjust power management of mouse and keyboard by checking the “ Allow this device to wake the computer”. Have you disable hibernation feature to find out if its causing the problem. I know it's a weird little problem but I want to hear what more experienced users know about it. If your PC or laptop fails to wake up from automatic sleep mode, or the display turns off, you still have solutions to fix this issue by disabling the automatic sleep mode.

See more about how to shut down, sleep, or hibernate your PC. For more power saving options, select Additional power settings to change how your device uses power. The weird thing is doesn't happen cmd Powercfg /devicequer wake_armed result in None How to Disable Automatic Sleep Mode in Windows 8/8.1 The sleep mode is a power saving state in Windows8.1/8,which can extend the battery life for your laptop or tablet. Under Sleep, select how long you want your device to wait before going to sleep when you’re not using it. I've just tested this a few times and wake it with mouse, spacebar, another key, power button.

Change sleep mode windows 8