Lost your Logitech USB receiver? If your logitech device has a small orange star on it you can replace the receiver with a unifying receiver (or even with any Logitech USB receiver that also has the orange star on it.)
All you have to do is obtain a new receiver and then install the unifying software. This saved my company quite a bit over time.
https://www.logitech.com/en-us/product/unifying-receiver-usb
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