My Xbox one won't stay connected to wireless

My Xbox One won't connect to the 5GHz band of my Asus N66U wireless router.

Sorry I missed out a vital piece of information - To get the wireless Xbox one to stay connected I had to enable one of the four 'guest' wireless connections on the router and dedicate that connection to the XBox one. Running the XBox on the main wireless
network caused it to disconnect if any other device connected, running it on its own dedicated guest connection allows it to stay connected until I enter a multiplayer game on our other Xbox One which is wired to the router.

The router doesn't seem to allow me to set a static IP Address for devices connected to the guest wireless networks, only the main wireless network.

Same thing is happening to me my Xbox one s won't connect to my internet but will connect to a hotspot or being hard wired but still won't connect to the wireless after doing all the steps

After the Anniversary Update, both my wireless dongle and Xbox One controller (both OEM) appear to be broken.

The dongle doesn't show up in Device manager, despite switching to different USB ports.

The gamepad now won't stay turned on, even connected via USB. Isn't detected in the "Xbox Accessories" app.

Looks like I managed to get the internet working on it but one of the wireless Zxyell wireless modem won't connect to my xbox one so I must use another one.