USB Wireless Adapter can't see Network

The new Xb7 has the 2.4 g and 5 g WiFi bands combined into 1 ssid, some devices can have problems with that, some folks split the bands, I have found if you change your adapters mode from auto to G it will connect, this may or not work, but I prefer this method if possible

The two WiFi bands have recently been combined into one with the Comcast gateway devices. Some devices get confused and don't know how to see / talk to combined bands.

If you are not using any Xfi Pods, you can try separating the 2.4 and the 5.0 bands and give them two different broadcast names / SSID's;

https://www.xfinity.com/support/articles/change-wifi-mode-admin-tool-xfinity-xfi

Associate that computer with the 2.4 GHz band's SSID (broadcast name) and password.

Thank you for the responses.  Will this make me have to force all of my devices to the different bands?  

Personally I would try the change the mode setting on your USB adapter, it’s a couple of clicks, that has fixed the problem you described in your post for me, my rational is, why change router settings that effect all the devices on your network, when you only have one rogue device, but that’s just me

jlavaseur, I was unable to locate the mode setting in the USB adapter settings.  I couldn't anything that changed it from g to n or auto.  I may not be understanding which setting it is, but it wasn't obvious.  My adapter is a Belkin n300 USB adapter.

I tried to rename the 2.4 and 5 bands to separate names and that didn't work either.  It still couldn't see the networks.

Ok, I go to device manager, under network adapters, locate your usb network adapter, double click on it, under the advanced tab, there should be some options, on mine I think it says mode, or something similar, look for a option that says auto, check what it says when you click on the drop down menu, since you have a N card, you might try setting it to N instead of auto, if that does work try G I hope that explains it better 

This is a pretty old adapter, but it has never had an issue until the new gateway and it can still see other networks in my neighborhood.  Here are the options I can get in the settings.....

I would try radio or WiFi config to start, but since there is only a few options, if you don’t find what your looking for, I would click on each one to see the options in the drop down menu 

I don't know I tried changing every setting and it made no difference.  I even moved it to another computer and it still couldn't see the network.  I guess I just need to get a new adapter....

You can get a usb high speed adapter for under $15 that works with both 2.4 g and 5 g sorry my other suggestions didn’t work, they have worked for me in the past

@ComcastStarr 

FWIW, in my networking experience, it's actually the other way around. There are more connectivity problems when the bands are combined than when they are separate. The only reason to ever need to combine them is to allow the Comcast pod devices to function properly.