what are the difference's between NAV PRO and a free antivirus. i'm running low on memory. i just increased my virtual memory as much as i can. i have 128 ramm memory. AOL. outpost firewall. i read NAV is bloatware. i disabled all the service's for network's. i emptied the cache. i put history down to 0 day's. i deleted all temporary file's. i only got 3 viruse's in over 1 year. would a free antivirus be good enough. i don't want to use bloatware if i can help it. thank you.