Both products use Quorum technology, which tracks files and applications by creating a 'reputation' for the file based on its attributes.
Cyber criminals tweak these attributes slightly in a bid to avoid detection by security software. However the Quorum technology constantly scours the web and updates the reputation of malware to ensure it can remain detected.
Symantec also said the new software was faster to install, has a smaller footprint than previous versions and offers faster scan times.
"We know that hackers don't destroy computers, they destroy lives. The powerful new reputation-based security in Norton 2010 gives people the power to deny digital dangers wherever they are found online," said Rowan Trollope, senior vice president, consumer products and marketing, Symantec.
Norton Internet Security 2010 is available in a standard edition, which is priced at £49.99 and available from Symantec now. A netbook edition, priced at £39.99, will also be available from October. Norton AntiVirus 2010 costs £39.99 and is available now.
All three programs come with a licence for installation on one pc and a year's subscription to Norton updates.
See also: Phishing attacks fell by 45% in August