If the firewall is set, it is not shared.
 

1. How to check Netbios settings.
Search and launch Network Share Center.
Click the Local Area item.
Click Properties.
Click Internet Protocol Version 4 (TCP / IPv4), and then click Properties.
Click on the Advanced button at the bottom and click Enable NetBios Over TCP / IP at the bottom of the WINS tab and click OK.

2. Check related services
Click Start -> Control Panel -> System and Security or Administrative Tools.
Click the service in the Administrative Tools window to launch it.
Make sure that the following four services are running:
Computer Browser
function discovery resource publication When this fails, the computer is not visible.
Server
Workstation
If it is not started, click the mouse button to start it.

3. Your computer is running Windows 10 and your computer is connected to a network that is assigned to a "public" network location.
Windows can not discover computers on networks that are assigned to "public" locations.
To resolve this issue, you can change the network location to "Personal" or connect to a network assigned to a "private" network location.
[How to set the network location]
a) Go to Settings -> Network and Internet -> Ethernet.
b) Click Ethernet on the right.
c) Set this PC's discoverable setting to On. (If set to Off, it will be set as public network)