Windows 10 File Sharing Nightmare!!

This is crazy! Windows 10 networking is driving me nuts! I have five Windows 10 PC's, one Windows 7 PC that has not been booted in more than two months, and one Windows Home Server SP2 with Power Pack 3 (Windows Home Server Consoles are installed). Two Win10 PC’s are Home and three are Pro. Four were upgraded from Windows 7 and one was upgraded from Windows 8.1. All of the Win10 PC's have the same firewall - Bitdefender Internet Security 2015. I am not a newbie but I definitely am not familiar with running commands. I am able to navigate to and check most Windows 10 settings. My network has me totally baffled. NONE of my Win10 PC's can see all of the other four Win10 PC’s. Some PC's can see only one or two. None of my PC's is visible by all of the other PC's except that the server is seeing all five of my Win10 PC’s.

My most recent upgrade to Windows 10 (July 29) “tells me” “that the computer is not connected to a network” and yet I can see two other PC’s, one of which is the Windows 7 PC that has not been booted in more than two months!

Network discovery is enabled. File and printer sharing is on. SMB 1.0/CIFS File Sharing Support is checked. Windows Firewall is off. Four laptops are wireless and my desktop and server are wired.
Can anyone PLEASE give me a complete checklist, line by line, of every setting to check and what each setting should be so that I can configure every Win10 PC exactly the same way ……

OR, refer me to an existing online checklist?
Thank you very much! I will be forever grateful.

Are all of on the same IP range? What router are you using by default most have user isolation set which stops any wireless of from seeing local PCs so if someone breaks in they can get the net but not attack local network. Which is the Master browser?

All are in the same IP range. Router is D-Link DIR- 655. Master browser is Chrome or SlimJet.

The PC that I am mainly trying to configure is the most recent Windows 10 Home laptop. When I try to match the settings with another Windows 10 laptop (unfortunately a Pro edition), I simply do not get the same options to turn on network discovery and I have been unable to change the network that I am connected to from Public to Private. I changed the Dword in the registry to private and after rebooting, the network still shows as Public!

The master browser is a pc that finds all other pcs and hold all the address and each pc looks to the master browser to get a list use this tool see what it sees and who is the MB NetBScanner - NetBIOS scanner

If you do from a cmd prompt ipconfig /all see if they all have this set
NetBIOS over Tcpip. . . . . . . . : Enabled

They all do have NetBIOS over TCPIP enabled.

does scanner see them all?

NO! Master browser sees only one laptop and the server although it does list the IP address for one other laptop and my main desktop. It does not even list two laptops. The two laptops not listed are 1 Home and 1 Pro.

When I click on "Advanced Options" for my wireless connection on the most recent upgrade, there is no setting available that lets me select "Make this PC discoverable."

Can you ping the pcs by name or ip?