If you Turn on Network Discovery, click Save Settings, then review it again and it's Off again then you need to check the following 4 Services. Set them to Automatic and then start the Services. You'll hopefully find that turning on Network Discovery now stays on!!

For network discovery, it's a common issue.

Open Services and make sure the following services are all running:

• DNS Client
• Function Discovery Resource Publication
• SSDP Discovery
• UPnP Device Host

After that turn network discovery on again and it should stay enabled.