Why can't I join the win7 family group

  
To resolve this issue
Click “Run” and follow the steps in the wizard.
If running the Fix It wizard does not resolve the issue, please refer to the list below:
There are no family groups available on your network. To create a family group, see Creating a family group.
It may not be connected to the network where the family group is located. To connect to the network, perform the following steps:
Click the network icon (

or

) in the notification area of ​​the taskbar.
Click on the network you want to connect to and click on “Connect”. You may be asked to enter a network security key.
After connecting to the network, if there is a family group on the network, you can join the family group.
You must be a computer running Windows 7 to join a family group. Home groups are available for all versions of Windows 7. In Windows 7 Starter Edition and Windows 7 Home Basic, you can join a family group, but you cannot create a family group.
This network location may not be set to “Family”. The home group runs only on the home (dedicated) network. To change the network location, follow these steps:
Open the "Network and Sharing Center" by clicking the Start button

, then clicking “Control Panel”. In the search box, type network, and then click "Network & Sharing Center".
Click on "Work Network" or "Public Network" and click on "Home Network".

Network and Sharing Center
Other computers in the family group may not be at home, may have left the home group, or are off, sleeping, or hibernating. For information on changing power save options, see Changing, creating, or deleting a power plan (scenario).
The computer where the home group was created may have been restarted and no one is logged in to the computer. Some of the services required by the family group can be started after logging in. Make sure someone is logged in to the computer where the home group was originally created.
No network discovery enabled. To enable network discovery, follow these steps:
Open the “Advanced Sharing Settings by clicking the Start button

, then clicking “Control Panel”. In the search box, type network, click "Network & Sharing Center", and then click “Change Advanced Sharing Settings in the left pane. Click on the chevron icon

to expand the "home or work" network profile. Click “Enable Network Discovery", then click “Save Changes”.

If you are prompted for an administrator password or for confirmation, type the password or provide confirmation.
For more information on network discovery, see What is network discovery?
One or more required services are not running. “Peer-to-peer network grouping” and “family group provider” services must be running. . Here are the steps to check:
Open the "Administrative Tools" by clicking the "Start" button

and then clicking "Control Panel". In the search box, type the management tool and click “Administrative Tools”.

If you are prompted for an administrator password or for confirmation, type the password or provide confirmation. Double click on “Services”.

If you are prompted for an administrator password or for confirmation, type the password or provide confirmation.
In the “Peer-to-Peer Networking group" and “Family Group Providers" service next to the "Status" column, you should see "Started" If you don't see the word, double-click the name of the service and click “Start”.
Peer-to-peer network The idstore.sst file is corrupt. If you see the message "Windows cannot set up a home group on this computer." Error code 0x80630801. ”, and you cannot use the above procedure to start the peer-to-peer network grouping service, follow these steps to delete the corrupted file:
Click the "Start” button

.
In the search box, type a command prompt.
In the results list, right-click “command prompt”, then click “run as administrator”.

If you are prompted for an administrator password or for confirmation, type the password or provide confirmation.
Delete the idstore.sset file located in the WindowsServiceProfilesLocalServiceAppDataRoamingPeerNetworking folder of your system drive (for example, drive C).
Restart your computer and try joining the family again.
Your computer is already in the family group. You can only belong to one family group at a time.
Your system administrator has turned off the family group on the domain-joined computer.

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