Norton Internet Security is perhaps the most useful online security tool. It bundles all the protection tools that are needed to keep a computer connected to the Internet safe. The most basic of these components is the anti-virus program. Norton Antivirus is one of the most powerful ones out there, and it powers Norton Internet Security. Viruses represent a great share of the threats that a user can stumble upon on the Internet, but there also are spyware, adware, scams, etc. Norton Internet Security protects you against all of them. All of these protection tools are integrated into a single main application, from which all of them can be accessed and configured. Liveupdate will make sure that your virus definitions are always up-to-date. I've had some difficulty getting this version to work on Windows Vista, but I have successfully installed newer versions. This is perhaps the most complete and powerful security package out there and it certainly makes me feel like I am safe from all those bugs. Should your system get infected with a virus or spyware, or both, Norton Internet Security will take care of them, but its goal is to never let one in.