On checking out my new Nexus 7 I tapped "Google Settings>Connected Apps" and found three entries, Mobile Nations, My Bitdefender and Safe in Cloud. As I don't know where they came from or what they are for I selected disconnect, but each one came back with the message that I am unable to do this.
I would be interested to know why they are there, do I need them, and how to get rid of them if I don't.