My mouse was lagging and then the cursor disappeared. The nano WiFi receiver is showing as working as is the mouse but I have tried everything Logitech suggests and it still won't connect. I have a great old Asus laptop.. Somewhere in the back of my mind I remember something about pressing a point on the touch pad but I can't remember what it was. Can anyone give advice otherwise I will drive to the city and buy a new mouse or receiver. Many thanks.