The user is unable to see 5G Wifi networks on their Dell Laptop.
It's a Dell Latitude 6430U - Windows 7 Pro
I checked, and the latest WiFi driver for this model is installed.
Device Manager General Tab says: Dell Wireless 1504 802.11b/g/n (2.4GHz)
Drive Tab adds Driver Date of 12/13/2013, Driver Version 220.127.116.11
The computer is 5 years old - is it possible that there was no support for 5G at that time?