Norton Antivirus is making me inwardly tingle with frustration. Every time I insert my USB stick it wants to scan it. Sadly, during the scan it freezes.:s How can I access NAV preferences so I can stop it scanning like this? I want to scan manually. Come to think of it, how do I normally access preferences via "Finder" Thanks,, ps; I am used to PCs but have just moved to the MAC.