I have two HID compliant mice listed in my device manager (Windows10). I only have one mouse plugged in at the rear of the PC. I disabled one of them and my mouse quit working. I got it back and removed the other one but it came back after a reboot. Why should there be two listed? One of the reasons for asking is that I can't wake my PC up with the mouse or keyboard and have tried several methods and am trying the Hybrid sleep method now. I do have my mouse and keyboard selected to allow either to wake the PC after sleep but they won't. it's not only aggravating but mechanically damaging to keep clicking the power button on the PC to get it out of the sleep mode.Curious if this is a laptop and the touchpad is listed as the 2nd mouse? If a desktop computer does the keyboard have any mouse control features like TRACK ball or accu-pointer or touch pad etc?It's a PC. BTW, the waking after sleep mode isn't working with the hybrid mode so I changed it back to 10 minutes to shut both off.
Some KEYBOARDS which have various "macro" features will add a Mouse device so that they can fake mouse inputs. Sometimes an additional mouse is added also by the device software for this purpose too.

I have two mice listed in device manager for this reason. One of them LISTS a Location of "on Corsair composite virtual input device" which presumably is related to my Corsair keyboard.An INTERESTING answer to why I have two mice. Thanks for the response.