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Had a result with a Logitech G602 mouse I bought 13 months ago. It stopped responding and I reckon the receiver is knackered because it wasn't detected by Logitech's re-connection utility when I tried to pair it with the mouse again. Strangely, Win10 shows it in device manager as being OK. I downloaded the firmware updater util out of interest and that couldn't detect it either. Whatever, I opened a chat with Amazon and explained and they agreed to send me a replacement tomorrow.