Nighthawk MR80 ethernet connected computers no longer detect the wireless network

Thanks for your reply. 

In this case, "no longer detect" means that neither Windows system lists the SSIDs (main and guest networks) in the list of available wireless networks.  They do, however, show other wireless networks (e.g. from nearby neighbors).

And yes, other devices can see the SSIDs, including two Android phones, two Kindle tablets, a Chromecast device, and two Roku boxes, all of which are connected and functioning as they should.

As for the firmware version, not being the latest, can you tell me the latest version number?  I'm basing it on what the admin software is telling me, so maybe I need to look somewhere else?

Thanks again for you response.

Pete