[. . . ] [. . . ] Logitech assumes no responsibility for any errors that may appear in this manual. Repair connection between mouse and USB receiver: launch the Connect utility from www. Desktop users: If erratic cursor movement occurs or button clicks do not register properly, insert the Nano receiver in a USB port closer to the mouse. If this does not work, order an optional USB Stand from Logitech Customer Support. [. . . ] [. . . ]