Windows Vista Laptop.
I have T-Mobile wireless 5-G Internet that I have a W10 Desktop, W10 Laptop and a Vista Laptop connecting to through Wireless connections as well as a W-XP Desktop connected via Ethernet. All the machines are able to communicate with each other through the T-Mobile device.
For whatever reason, the Vista machine loses the name of the T-Mobile device – everything appears to work, however, in attempting to ‘connect to a network’ the name of the T-Mobile network has disappeared.