the same number that you originally used to activate it as long as your subscription is still valid. If you forgot that number I would call Symantec if it were me.
I recently re-formated my computer and the re-loaded Norton internet Security. After i re-loaded it, it said that i had to activate it in order to use it. Now, it was activated before i re-formated my computer and i pay for the subscriptsion. should i activate it? what should i do?