Turning off Norton AntiVirus when installing Final Cut
I can't figure out how find -- and then turn off -- Norton AntiVirus protection on my Macbook Pro before installing Final Cut Pro. Does anyone know if it comes preinstalled? I know something is checking for virus when I download, but I can't find anything "Norton" when I search. Also, do you really need to turn it off to install Final Cut?
Thanks!
MacBook Pro, Mac OS X (10.5.6)