I didn't install it, per so many recommendations of others, but I believe it can be installed as part of the nVidia platform driver package. Download the latest package and install it, and you should get a popup that asks if you want to install the firewall and some other application (both of which I declined). Also the motherboard driver disk has this package as well, though I am not sure it is the latest version (I always download from the website to be sure I have the latest versions rather than trusting I get a recent revision motherboard install CD).
\Dan