Wireless Keyboard Intermittently Stops Working
Solution: Try going into your BIOS and in the USB section disable backward compatibility. This fixed my problem and my older USB 1.0 mouse still works.
My mouse and keyboard would intermittently stop working about once per day. It was infuriating. I tried EVERYTHING including a completely fresh install of windows.
I don't think my fresh Windows install was part of the solution but I did do it the day before I disabled backward compatibility in BIOS for USB devices so you may also want to try that. I definitely still had the problem after the clean Windows install before I made the change to the BIOS.
I'm currently on day 3 of no problems so I'm pretty sure this works. Previously I had the problem at least once a day if not more.
I have an ASROCK motherboard - not sure if that matters.
Goodluck!