I've been using Zone Alarm Suite for the past six months. No problem with it. I like the way it grabs viruses. I had used Zone Alarm Pro for 2 years prior to that. Never had any problems. I just bought Norton 360, but won't install it for another six months when my ZA subscription runs out. I also use(d) Norton Ghost 10 to do a complete backup of my boot (system) drive. I had problems with that. Any thoughts on Norton 360?