I originally had a logitech g100 and it suddenly started to not recognize clicks so I got new different mouse and after a few months it started to do the same and I would have to press the left clicker really hard. I got curious and hooked it to my laptop and it started working perfectly and then tried it back on my desktop and same problem once more. Even tried different USB slots and borrowed my uncles mouse and it would do the same. Anyone have an idea as if it's my USB or some setting I should look into that might have been changed. I am running Windows 7 by the way.