Cannot Connect To Setup - Keep seeing old ASUS message at 192.168.1.1

[ms111263]

Today, I purchased a Nightawk X6S router to replace an old ASUS router. I have removed the old router and connected the new one, but I cannot reach the setup pages at 192.168.1.1 when I try to use my wired desktop.  Instead, I see an old error message from the ASUS router at this address:

Settings have been updated. Web page will now refresh.
Changes have been made to the IP address or port number. You will now be disconnected from RT-AC66U.
To access the settings of RT-AC66U, reconnect to the wireless network and use the updated IP address and port number.

I did check, and the gateway is at 192.168.1.1.  I am also able to connect through a safari browser on my phone. What is going on with my desktop, and how can I fix it?

Thanks,

[James721]

Clear all browser cashe and history and try again. Your browser is likely still thinking its connecting to the Asus router at the 192.168.1.1 IP.

[ms111263]

Thanks for the suggestion, but I have cleared my browser data. I have also encountered this error on several different browsers.  This error message actually mentions the ASUS browser from 2 years ago, not the one from yesterday.  2 Years ago, I had a router that used 192.168.1.1, but the most recent one (that I just replaced) used 192.168.50.1.

[antinode]

> [...] I purchased a Nightawk X6S router to replace an old ASUS router.
> [...]

   None of that is a model number for anything.  On the Netgear device,
look for "Model" on the product label.

   And then you connected it to what?

> [...] RT-AC66U [...]

   Is that your (unspecified) "an old ASUS router", or is it something
else?

> I did check, and the gateway is at 192.168.1.1. [...]

   What, exactly, did you "check", how, exactly?  Whose "the gateway"?

   Knowing nothing, my first guess is that you don't know what you have
connected to what.  (Or, for that matter, what you have.)

   I'd disconnect the new router from everything except (power and) one
wired computer, and see if I kept getting messages from some phantom
ASUS device.  Then, if that simple arrangement behaved as expected, I
might start connecting more things to the new router until I made
everything worse.