>>I've never had any wireless mouse be reliable without the usb receiver on the side (laptop) or front (pc).
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>Yes, it seems to make a big difference. So far, for the entire day, on two surfaces, the mouse has been performing well. I don't know why but something was conflicting on the back. Maybe an unshielded cable was in effect. I have one going in the basement for the subwoofer and that could have caused it.
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>>I will NEVER EVER EVER buy a logitech mouse again after my own and my mother's experiences. The first thing I did was hit their forums for resolutions and they are filled with issues that cannot be resolved easily.
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>Yes, they do have a lot of issues. I have read some of them and we can just hope they will have something better soon.

Sometimes you have to resynchronize your device with the receiver .

These are the recommendations (the computer case issue is interesting because it will block the signal and if the usb connection in the back would cause the signal to have to pass through the case to the mouse):


Items such as wireless routers, radios, cell phones, desktop fans, fluorescent lights, and large metal objects like computer cases and metal furniture may interfere with the signal of the keyboard. Try to keep such items away from the keyboard, and check the behavior of the keyboard.

Do not put the mouse or the receiver near any electrical devices, especially transmitters such as cordless or cellular telephones or other wireless mouse devices or receivers. A distance of at least 8 to 12 inches is recommended. Do not put the mouse or the receiver on metallic surfaces or objects, especially long metallic rails or cables. We recommend that you keep the mouse and the keyboard a minimum of 3 feet from metallic objects.