My extender is brand new (and this is the second device I have had in the last month). The extender is able to create the 2 dead extended networks and then (once connected to either dead network) disallows access to the local address of the wifi extender. I have been able to get a certain point in the setup where it asks me to check a checkbox once I have established a connection with one of the new networks on a seperate device. Once checked, however, I am met with a DNS error and am dissallowed from default gateway IP address for the router (192.168.1.1). I cannot access the router configurations at all once the 2 networks have been created, even after multiple attempts of factory rebooting. The new extended networks are able to be connected to but no internet is available. I have factory restored both devices numerous times and spent hours on the phone with Netgear support. This entire process has been re-created multiple times over and I have also had the same luck using the WPS method.
Also should mention, all troubleshooting is taking place in the same room as router/modem. I have attempted to move the device after the networks were created. Currently, the device has been factory rebooted and is remaining in the same room as the router until resolved.
