They are telling you it's too complex for those forums.
Here I usually find this to be a settings issue but where? Firewall, accounts, choice of network sharing (we have workgroup, Homegroup, accounts and the 10 things noted at https://www.howtogeek.com/school/windows-network-sharing/lesson2/all/
I'm not able to check these for you as I'm not at your PC but read the HowToGeek article and you must master all 10 areas.
I have little understanding of networking. Until recently all worked according to Hoyle. This Win7 Pro sp1 PC is wired to a TP-Link Archer C9 router. This machine shares on the Homegroup and LAN with another wired Win 7 pc ok but is not visible to any wifi android devices. The second PC shares fine with wifi android devices so I suspect this PC is at fault.
Following are the ipconfig reports for both PCs.
At fault(?) PC
Windows IP Configuration
Host Name . . . . . . . . . . . . : Johns-PC
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
Ethernet adapter Local Area Connection* 9:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : SurfEasy TAP-Windows Adapter V9
Physical Address. . . . . . . . . : 00-FF-3E-F1-1F-BD
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : NVIDIA nForce 10/100 Mbps Ethernet
Physical Address. . . . . . . . . : 00-1A-92-D0-F7-F7
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::fd6d:f16d:74b7:2fa7%11(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.0.102(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Thursday, 10 August, 2017 9:40:00 PM
Lease Expires . . . . . . . . . . : Thursday, 10 August, 2017 11:40:00 PM
Default Gateway . . . . . . . . . : 192.168.0.1
DHCP Server . . . . . . . . . . . : 192.168.0.1
DHCPv6 IAID . . . . . . . . . . . : 234887826
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1F-B9-6E-4B-00-1A-92-D0-F7-F7
DNS Servers . . . . . . . . . . . : 192.168.0.1
NetBIOS over Tcpip. . . . . . . . : Enabled
Tunnel adapter Local Area Connection* 11:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft Teredo Tunneling Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Working PC (visible to android devices)
Windows IP Configuration
Host Name . . . . . . . . . . . . : BARB
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : NVIDIA nForce 10/100 Mbps Ethernet
Physical Address. . . . . . . . . : 70-71-BC-79-42-16
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::2502:fdbd:1d97:76be%10(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.0.104(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : 10 August, 2017 8:56:35 PM
Lease Expires . . . . . . . . . . : 10 August, 2017 10:56:34 PM
Default Gateway . . . . . . . . . : 192.168.0.1
DHCP Server . . . . . . . . . . . : 192.168.0.1
DHCPv6 IAID . . . . . . . . . . . : 242250172
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-14-11-60-01-70-71-BC-79-42-16
DNS Servers . . . . . . . . . . . : 192.168.0.1
NetBIOS over Tcpip. . . . . . . . : Enabled
Tunnel adapter isatap.{8F626783-6FCB-4345-B1E8-BE70DD14B1BE}:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Tunnel adapter Teredo Tunneling Pseudo-Interface:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Any suggestions/help will be appreciated, thanks. John.

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