I am running an iMac G5 (just pre Intel) using OS 10.4.11. My internet is via an external modem, ethernet connected. Everything is working fine (as far as I know!) However, for no particular reason I opened "System Preferences" and on clicking on "Network" was confronted with this:- http://att.macrumors.com/attachment.php?attachmentid=155629&stc=1&d=1233487872 On clicking the OK button nothing happens and the only way to get out of System Preferences is to Force Quit it. As I can't get into "networks" in System Preference, I have no idea how the settings have changed. I can't remember when I last installed any new software - it's also ages since I looked at that section of System Preferences. Any help would be gratefully received!