I have Norton Internet Security 2009 installed on 3 computers but i will be formatting one of the computers to upgrade windows versions etc and will therefore have to run the installation process again. I know NIS only allows installations for 3 P.C’s but i wondered if there’s a way of disabling one of the installations so that I could reinstall Norton Internet Security when I’ve reinstalled windows etc? I will still have Norton on 3 machines - not 4 but will obviously somehow need to run the installation process a fourth time. Can anyone help?