Neither. Uninstall it now and use some decent free alternatives instead. I recently removed NAV from a notebook before it was activated, so NIS should also be removable in this state, notwithstanding any issues that NIS may well have with being uninstalled.
Run CCleaner afterwards click here
Then pick from any of the usual supects; Avast and Kerio would be a good combination. Kerio is a thirty-day trial but reverts to the free version after that, which is very nearly as good and all you need. Then add Ad-aware and/or MS Anti-spyware.