Problem:
My network is marked as public when it should be private.
Solution:
Right-click the network icon in the task bar
Click Open Network and Sharing Center
Click Change adapter settings
Disable any other networks leaving the network you want to change enabled
Open File Explorer
Click Network
You will see an error about Network discovery
Click OK
At the top of the window you will see a Network discovery message
Click it and select Turn on network discovery and file sharing
Click No
Now your network is private
You can now enable your other networks.