I've had this problem back with Windows 8.1 but was able to fix it using the Device Manager. But I have tried just about everything in the Device Manager and unchecking the "Allow this device to wake my computer" but it still keeps waking up. In Windows 8.1, I could go to Command Prompt and use "powercgf -devicequery wake_armed" and it would tell me what woke it. But they removed that feature from Windows 10 because CMD Prompt says "powercfg is not recognized". This was a useful feature to have and now my computer keeps waking up for no reason and I can't figure out why. The keyboard and Mouse is disabled from waking up the computer.
Does anybody know how to find out what's waking it up and how to stop it in Windows 10?