I agree with .unicorn and everyone else that agrees with him... :P I used norton much in the past (both on the pc and the mac), and had a lot of issues with the computer slowing down--not speeding up. the only case where I actually utilize norton's software is in their dos software like disk doctor and disk editor...

those are some hdd utilities that have saved my a$$ many times before... can't live with out 'em!
-CaP