So I bought a second hand Airport Extreme off ebay. It's a 2nd Gen airport extreme. I thought setting it up would be a doddle, plug it in and up it would pop in Airport Utility. I was wrong. I've got it connected to a Virgin Media Super Hub that I have set to Modem Mode, so it is just working like a modem and not pumping out any conflicting wireless signals. The ethernet cable goes from the modem to the WAN on the Airport Extreme. Turning the Airport extreme on produces a constant flashing amber light and nothing else. I cannot see it in airport utility at all. I tried factory resetting it, but the orange flashing light still persists. I can't connect it directly to my Macbook Pro by ethernet either as I am using a Retina Macbook Pro and I don't have an ethernet dongle. I can however, connect to a netbook that is running Windows XP SP3 via ethernet. I installed Airport Utility for Windows and the Airport Extreme does show up as: 'Airport Extreme with 802.11n (Gigabit Ethernet) with default settings. Airport Extreme Name: Base Station 000000 IP Address 192.168.0.4 Version: 7.6.1 If i click 'continue' or 'manual set up' to have a look at and change the settings I am presented with the following warning: 'An error occurred while trying to access the Apple wireless device. Make sure your network connection is valid and try again. Error -6742. I read this might be the firewall or anti virus blocking the connection, but turning both of makes no difference. I tried phoning apple support, but the helpdesk is closed. Can anyone help me, or was I sold a dodgy Airport Extreme? Thanks for reading.