loss of norton internet security

      After down loading norton internet security (And saving it on usb memory stick) I had a problem with my laptop and

      returned it to factory default settings.On new start up i accepted McAfee 30 day cover as i thought id lost my cover

      with norton. How can i recover norton internet security,do i have to disable McAfee? I get Norton on back up, but

      cant restore it, help !