I have one. I haven't tried NT4 though. The error sounds like the router might be running its samba server and doing some kind of announce that's confusing NT4...

By the way I strongly suggest looking into flashing XWRT Vortex firmware. I've been running it for about a year. It is quite the improvement over Netgear's software.

I have found quite a few irritations and bugs with the Netgear firmware. I was going to wait until the unit was out of its warranty period before flashing the firmware. Is XWRT Vortex any better than DD-WRT for this router? I am also using this router to stream videos. I have two 2 TB external HDDs hooked up to it. Does XWRT Vortex support a streaming server?

The largest annoyance I currently have with the R7000 is that when power is lost, it sets both HDDs to the same share name. I need to go into the setup page and set one to "television" and the other to "movies", otherwise only "television" shows up. What makes this most irritating is that it takes about a day to recreate the database. My temporary solution was to put the router, modem, switch, and HDDs on a UPS, which is good for a 2-hr power outage.

Anyway, do you happen to have a computer with NT4 installed you can connect to your R7000?

Edit: Another frustration I have with this router's firmware is that it does not have the option to enable a MAC filter for only wireless connections. It is setup to either MAC filter, both, wireless and wired, or no MAC filter. As I have numerous computers, it is quite cumbersome to always go into the setup page to add another MAC address to the "allow" list. If the firmware needs a clean sweep of the settings, I have to re-add all the computers again.

XWRT Vortex is fully loaded ASUSWRT. This is what ASUS develops and runs on their routers. R Merlin maintains an open, customized version of it and that has been ported to R7000. The advantages over Tomato and DDWRT are full WAN/NAT hardware acceleration (CTF and FA), and also the ability to get full speed USB 3.0 transfers because you can disable the USB3/2.4ghz WiFi interference mitigation setting that restricts the router to USB 2.0. Netgear's firmware runs USB 3.0 too.

XWRT does indeed have a DLNA media server. I've used it with great results.

I don't have anything with NT4, sorry. I haven't used the OS in many years. I really only used it a bit while in college...