Symantec Norton Internet Security 2009 is one of the more expensive security products on the market, but it is also one of the most effective at detecting and blocking malicious programs currently in circulation, and has the benefit of an easy to use interface that will suit all computer skill levels.

Norton 2009 has extensive malware detection capabilities, and will scan your computer thoroughly for spyware, trojans, adware, worms and other harmful programs, but no single Internet security package can tackle all the hundreds of variations of malware currently on the market, and Norton falls just slightly behind G-Data Internet Security 2010 and BitDefender Internet Security 2009 in the first stages of detecting malware.