Logitech G7 Mouse "cursor sticking touch pad" Questions

...cursor studder and stick plus the keyboard letters sometimes have to be hit twice. any idea? make sure you only have one finger on the touchpad? sometimes take everything off it and try using the ...

...a 'jumping cursor' and I want to disable the touchpad. There is no icon in the system tray and I can't find anything in Control Panel. What do I need to do? Jim please help the touch pad is not ...