Receiver not detected by Logitech Unifying Software but detected by Windows : r/LogitechG
How to Pair Mouse & Keyboard with Logitech Unifying Receiver
Amazon.com: Logitech USB Unifying Receiver, 2.4 GHz Wireless Technology, USB Plug Compatible with all Logitech Unifying Devices like Wireless Mouse and Keyboard, PC / Mac / Laptop - Black : Electronics
Ask a Swiss: How to connect a non-Unifying Logitech keyboard & mouse to a new dongle