thedeftone2

I followed the steps listed by jodafi when I had restarted and had hte error "Dumaos is not loaded yet...", but I wanted to clarify a few things for others that wasn't as immediately obvious to me.
Completely stock XR700 running 1.0.1.50. Monthly restart revealed the error and it immediately cost me 4 hours with my family on a Friday night. Whoever 'effed this up needs a firm nudge in the nads.
Handy pre-start tip - If you have a lot of address reservations, port forwards etc. screen grab each page and paste it into Word so you can quickly re-enter later.
1. I downloaded http://www.downloads.netgear.com/files/GDC/XR700/XR700-V1.0.1.20.zip, extracted it 
2. Then I logged in through this address http://routeripaddress/adv_index.htm to access the Netgear end of the Firmware
3. I accessed this address http://routeripaddress/debug.htm and clicked "enable telnet"
4. Clicked /Administration/Firmware Update/Browse , selected the unzipped file "XR700-V1.0.1.20.img" and then clicked 'upload'. 
5. Once it was installed and rebooted, I factory reset it by holding in the reset button for more than 10 seconds. I used a toothpick.
6. Once it had rebooted, I then set up the router as usual with admin and password, however, once setup, it would still return back to the error.
7. I used CMD in windows, run as administrator and then typed "telnet routeripaddress (type your router ip address here)
8. It will ask you for your router password that you just set up.
9. Then i followed this part of jodafi's earlier post but importantly, you need to copy paste the whole lot. I got stuck here because I couldn't paste into CMD. You have to right click the Window title bar (the bit you grab when you drag a window around the screen) then click 'edit' and paste the whole lot into CMD. Then press enter. Once this is done, you should be good to set it up again with your login details etc.
I also upgraded to the latest Netduma OS for this router and it feels snappy and happy. Not touching it until it dies again!
 

Access via routerlogin.net/adv_index.htm disable WiFi radios in Settings > Advanced, apply, reboot from the interface, close the interface, wait 4 minutes, then enable and follow the same procedure. See if the WiFi & normal access works then