In Norton Management under account it show all 4 of my computers. Yet under devices it only will only show 3. Worked with online support for a few days and they could not figure it out. When I put antitheft on the 4 th computer then the one of the devices will switch under devices. Then the next time I logon to the computer that disapeared from devices says I need to install antitheft again. If I do they will switch back. I can go back and forth all day. Does anybody have any ideas?