First of all i'm running a rooted Samsung -- maybe that has something to do with the situation...
However, you know, i was looking at some of the other apps i installed while trying to get a USB connection and some others appear to be:
root checker, USB Device Info, USB Host Control, USB Host Diagnostic and VX ConnectBot
As you can see i was also pretty desperate. i haven't had time to begin to disinstall the ones i don't need - who knows, maybe i need all of them! - lol.
The top bar of my screen - when i pull it down - has a line which says - Android debugging enabled. Select to disable debugging.
However i don't remember where i set this up from! Aha! i swiped it and got a menu "Developer options".
i hope this helps - have a great afternoon!