Win 7 can not join the family group solution

Q: The two machines in the home are all upgraded to Win 7, but when I want to share resources through the family group, I found that both computers can create a family group, but can not join The other party, how can I solve this problem?
A: In the LAN, multiple Win7 system computers are in the normal boot state, this phenomenon should first be opened "Control Panel /System /Advanced System Settings", check these computers The device names are the same, if they are the same, you need to rename them. Open the “Control Panel/Network and Sharing Center", click the icon below <;View Active Network" to set the network properties to Family. Click <;Network & Sharing Center/Change Advanced Sharing Settings", in “Home or Work (current profile)" Enable “Web Discovery> and “File and Printer Sharing" By accessing the password, you can turn off <; password protected sharing”. Then check the “Network and Sharing Center” in the “Network and Sharing Center” to add the “Add Now” button, click this button, and follow the prompts to enter the family group password on another computer.
The reason why you can't create a family group:
You can't create a family group on a network with a domain. You can only choose to join. If the system service, "Peer-to-Peer Network Grouping" and "Home Group Provider" are not able to create a home group, please open the "Control Panel /Management Tools /Services", respectively Double-click the names of the two services and click “Start”. In addition, the family group password can be viewed in the “Control Panel/All Control Panel Items/Family Groups/View and Print Family Group Passwords” box.