Just found this thread. I've had TWO fails of my Logitech Bluetooth MX5500 Mouse/Keyboard combo under Win 8.1 since I upgraded. NEVER has this happen on the older OS's on this computer, Vista and W7 (all are 64 bit).
This first time it happened was about 3 weeks ago. I was using the mouse and all of a sudden it stopped working. So I just used the power button to re-boot the computer and it was working OK. Thought it was a glitch.
Last week, when the computer powered up, no mouse nor keyboard (keyboard said NO CONNECTION in its display). I tried to re-connect the mouse and keyboard but it didn't work using the button on the dongle and the mouse and keyboard. I then pulled the USB dongle and heard the familiar 'ding' when USB...