Similar to these questions:  

[What Firewall Rules Should Be Used For A Home-Based System](https://serverfault.com/questions/7513/what-firewall-rules-should-be-used-for-a-home-based-system) and  

[Firewall on VPS Use Windows Built In](https://serverfault.com/questions/6320/firewall-on-vps-use-windows-built-in-or-3rd-party)  

But more specifically I'm guessing that using both the Windows Firewall and a router's built in firewall are redundant? Which is generally considered the better option for general computer/internet use?(For an example, I personally have a [D-Link Router](http://games.dlink.com/products/?pid=370)) What would you recommend to non-tech savvy folk?