The 8.1 machine is configured as Private network.
The 7 machine is configured as Home network.
Both services are running on both machines.
Neither machine's HomeGroup Troubleshooter could identify the problem.
The 7 machine doesn't detect a new HomeGroup on the 8.1 machine.
The 8.1 machine doesn't detect a new HomeGroup on the 7 machine.
IPconfig on 8.1 machine:
C:\Windows\system32>ipconfig
Windows IP Configuration
Wireless LAN adapter Local Area Connection* 13:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Wireless LAN adapter WiFi:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Ethernet adapter Ethernet:
Connection-specific DNS Suffix . : default
Link-local IPv6 Address . . . . . : fe80::f18a:704e:c5b2:dc26%16
IPv4 Address. . . . . . . . . . . : 192.168.1.25
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.1.1
Ethernet adapter Local Area Connection:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Ipconfig on 7 machine:
C:\Windows\SysWOW64>ipconfig
Windows IP Configuration
Ethernet adapter Local Area Connection 2:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . : default
Link-local IPv6 Address . . . . . : fe80::98ec:bf83:e076:511c%10
IPv4 Address. . . . . . . . . . . : 192.168.1.84
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.1.1
Tunnel adapter isatap.home:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Tunnel adapter Local Area Connection* 11:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :