Norton Identity safe

I have a license for 3 N 360 and I have a question.

 

On my third PC (My Grandson's) I tried to set up identity safe but I don't want it to be linked to my other 2 Pc's  (W8 and W7). How can I create a different identity safe so it will not link to my 2 other PC's? I tried but it makes me sign in with my password and my email.

 

Thank you for your time in guiding me in the right direction.

 

NanaH