Hi Bettye, I can't talk about cordless optical mouse as all of mine are still the type with cords. I have 3 at home and 1 at work. But, another man at work got the cordless optical mouse for both of his at home. He had some difficulty until he figured out there was some kind of interference with the signals. He moved something from one place to another and it started working. It might have been one of those phone systems that comes with one of those "radio signals". systems. Not for sure about that though. Just an idea.... take care - Emma In a message dated 8/13/05 3:30:25 AM Central Daylight Time, BHold1@aol.com writes: << Everyone has different experiences. And in this case, I really had a lot of problems with my cordless optical mouse. I finally took it off and went back to my old one. The cordless was very difficult for me to control it, and your description of your problem sounds exactly like the problem I was having. Bettye >>