I ONLY use firefox,
and also AVG and Zone Alarm, and I've never, ever had any probs on ATS.
Spybot search and destroy is also OK, and I also have a registry cleaner which I only let my techie brother do for me
edit to add after reading above post - the reg cleaner I use is the one above CCleaner.
Norton - PAH! I fart in your general direction.
[edit on 25/7/2008 by budski]