Why you should really, really update your Logitech wireless dongle - The Verge
Logitech Unifying Receiver Not Recognized in Windows 10
Marcus Mengs on Twitter: "Logitech Unifying receiver fake. Bought 3 cheap Unifying CU0008 receivers (TI chip). Turner out, they all are CU0007 (Nordic) with wrong label and ALL HAVE THE SAME S/N