The forum you posted to is for the discussion of Microsoft Security Essentials beta. You do not need Network Magic to set up your wireless router. Configuring wireless security should be explained in your router documentation. You can also use the D Link set up wizard -
http://support.dlink.com/emulators/wbr2310/
Jim - MVP Windows Live - Forum Moderator - Live One Care - Live Mesh - Microsoft Security Essentials