Prevent the computer from joining a homegroup

This policy setting specifies whether users can add computers to a homegroup. By default users can add their computer to a homegroup on a private network.If you enable this policy setting users cannot add computers to a homegroup. This policy setting does not affect other network sharing features.If you disable or do not configure this policy setting users can add computers to a homegroup. However data on a domain-joined computer is not shared with the homegroup.This policy setting is not configured by default.You must restart the computer for this policy setting to take effect.

Policy path: 

Windows Components\HomeGroup

Scope: 

Machine

Supported on: 

At least Windows Server 2008 R2 or Windows 7

Registry settings: 

HKLM\Software\Policies\Microsoft\Windows\HomeGroup!DisableHomeGroup

Filename: 

Sharing.admx