I sometimes wonder if 'protection' progs from multi vendors can lead up to problems of conflict?
I'm aware that Norton supply a product called Norton internet Security that provides ....
antivirus ......
Anti spam (pop ups - Adds etc) ....
Firewall .....
Spyware and adware ....
etc ....
might it be better (if your a fan of NAV) to have all the protection running under a common vendor ?