I recently got a new PC (very happy with it, works great) but ran into one problem: The mouse light stays on even when I shut it down. Everything else-- fans, other lights, etc.-- all turn off and the display goes dark, but the mouse continues to shine. I'm not sure why. I've looked through other threads (on Tom's Hardware, but it was having login issues so I couldn't post a thread), and tried suggestions there. However, "Deep Sleep" mode did not fix the issue, "ErP"/"EuP" is nowhere to be found, and I cannot find "Selective Startup" in my Windows settings. (Although it is a Win7 setting, and I have Win10) I would also like to fix this problem without having to purchase any extra USB extenders or peripherals.
Specs: (Relevant only, I'll give more if asked)
Motherboard: ASRock AB350 Pro4
OS: Windows 10 Pro (64 bit) and Xubuntu 16.04 LTS
Mouse: Tecknet Gryphon KB&M combo (Note: Keyboard does not display same issue.)