Help & troubleshooting for network issues, including connecting your device to your home Wi-Fi network, connecting to public networks, troubleshooting wireless issues & ethernet connections, and optimizing streaming performance.
The Roku isn't over-riding anything. But for whatever reason you can't see the new WiFi access point. First thing to check is if your new WiFi is broadcasting on both 2.4 and 5 GHz. You computer might not support 5 GHz, and if your WiFi is only using 5 GHz you won't see it.
If your computer does support 5 GHz, the next thing to check is the channel it's using. In the 5 GHz band, there are channels labeled NFS, and many devices won't support those channels. The 5 GHz channel number should be 48 or lower, or 149 or higher.
So, let's say your WiFi is correctly using the 2.4 GHz band. In that case, there's likely some interference that is causing the problem. In this band, the channel numbers go from 1 to 11 (in most cases). Try changing the channel to one end of the spectrum or the other to get away from the interference.
What you see with the Roku SSID is the connection between the remote and the Roku. It's not something your computer could join anyway.
Dan Roku Stick (3600), Ultra (4640), Ultra (4670), Ultra (4800), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.