The Norton Pulse Updates Feature
It’s a simple truth: The faster virus definitions are received, the better the protection is for the computer. Norton 2009 has added a new technology, called Norton Pulse Updates, which downloads new virus definitions almost as soon as they are created, without sacrificing reliability or performance.
When new virus definitions are created, they are posted right away as small Pulse Updates. Every five minutes, Norton LiveUpdate downloads the latest Pulse Updates and they are incorporated into the customer’s PC virus protection immediately.