Nerds makes decision based on technology, Not on Social Desirability, or whatever the Computer's vendor installs as a trial because they got money for it.
At the moment the best solution, and the least expensive. As in Free.
Windows Defender as an AntiSpyware (installs with the OS in Vista and Win 7).
Windows security Essentials as AntiVirus. http://www.microsoft.com/Security_Essentials/
PCTools Firewall as a software Firewall. http://www.pctools.com/firewall/
Vista/Win7 native firewall is very good too but impossible to configure and control it in fast intuitive way. It is a very good solution in IT environment where you can spend time to configure it once and then propagate over the Network, and forget about it.
However on a small Network, PCTools Firewall is much more flexible and very easy to control and configure.
The above three work forgather in harmony on both Vista and Win7.






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