What "security" settings are you talking about? Did you consider visiting the manufacturer's support site and checking if there's upgraded firmware for the router? What version/patch level of Windows are you running?
These are the security settings that are for the Linksys Router to keep other people from accessing our network wirelessly without us adding their MAC address. We have to add the MAC addresses for people to access the network wirelessly. My mom's laptop (wireless) is Win XP Pro SP2, while my laptop (wireless) is Win XP Home SP2. The Print server (wired) is Windows Server 2003 SP1.keymaker said:we a bit more info on the security settings your talking about. before you do a firmware upgrade, provide more info on security settings.