I have a Actiontec MI424WR Rev. E router. I installed the new driver and the Intel PROset utility and unfortunately nothing changed. I went to settings to investigate some of the other solutions you proposed and I stumbled upon something that appears to have solved my problem. What I found at SETTINGS/Network & Internet/Change adapter options/Wi-Fi/View status of my connection/Wireless properties/ on the connection tab there was an unchecked box with the words "Connect even if the network is not broadcasting its name (SSID)". I checked that box and since then I have been able to connect to my network wirelessly with SSID broadcast disabled. I will now call this solved and if any new problems crop up. start a new post. Thanks for sticking with me on this. Ed J.
I like to set my router up so that my SSID is not broadcast as I think it is a logical step to take for increased security. I have not been able to do that since I started using my new Inspiron 5558 laptop. I have tried this several times and each time I disable SSID broadcast I am not able to connect to Wi-Fi on this laptop. Other remote computers in my household and my smartphone connect without a problem, but nothing I have tried allows my new Dell laptop to connect via Wi-Fi, with the exception of enabling the SSID broadcast. 
Can't connect via Wi-Fi with SSID broadcast disabled