Here's where it gets counter-intuitive. To remove a Logitech device, click Add Devices on the previous screen, and then Add Unifying Device on this screen. Yes, to remove, you must click Add. I know.

Logitech is about to release keyboards and mice with a tiny USB receiver which aims to overcome such things by allowing multiple peripheral devices to connect to just one receiver.

Now this just makes sense. Instead of having a receiver for every USB wireless device, Logitech managed to stuff the right goods into its Unifying receiver. This little guy can pair with up to six ...