I have the Logitech Mk520 Mouse and keyboard, with unifying receiver installed on my system. Today, I suddenly started having a weird issue where if I remove the receiver then place it back in, the keyboard stops working. However, the function keys (e.g. volume control, calculator key, etc) still work. This persists until I restart the system. This doesn't occur when in safe mode (removing and re-inserting the receiver simply results in the keyboard turning off and on). In addition, the mouse and keyboard turn back on faster in safe mode when the receiver is placed back in compared to non-safe mode. I've tried uninstalling the Logitech Unifying Receiver USB Composite Device driver from devices and printers, but after reinstalling the drivers, the problem persists. I also used Logitech's unifying software to unpair and re-pair the keyboard, same result (only function keys working, rest of the keyboard doesn't).
So is there a way to cleanly reinstall my mouse and keyboard drivers, and solve this issue?
My OS is Windows 7.
Edited by Jax765, 13 December 2016 - 11:45 AM.