NETWORK DISCOVERY WILL NOT STAY TURNED ON. WHEN YOU TURN ON NETWORK DISCOVERY AND CLICK SAVE CHANGES. IT WILL NOT STAY TURNED ON. 

Kindly try the below steps to keep it turned on. 

1. Make sure that computer is on and that you've enabled file and printer sharing on your network.

2. Click on Start and in Start search type in Services.msc and select Services in list. Ensure that the required services are Started given below

o Computer Browser
       o DHCP Client
       o DNS Client
       o Network Connections
       o Network Location Awareness
       o Remote Procedure Call (RPC)
       o Server
       o TCP/IP Netbios helper
       o Workstation

 All of these services should be started, and their startup type should be automatic.
To change the startup type, double-click on the service name and change accordingly.

This should do the trick.

This worked for me. Hope this works for you. 

Thanks and Regards, 

Dell Tech XPS