When joining a Homegroup, Windows 7 automatically gives "Everyone" user group full control (read and write) ACL to share C:\Users but your files are still protected by local NFTS ACL permissions that you find under "Security" tab. The local ACL/NFTS permissions further restrict access to files/folders same way as if you were accessing locally. So if "Everyone" has full access to share C:/Users it doesn't really mean that they have full control permission on all files in Users directory, YOu have to remember that Share Permissions and NTFS Permissions combine to give you the effective permission. A Google search for: HomeGroup "users folder" ( ) confirms this serious security/privacy risk in Windows 7 RTM.
If this is a bug, this poses a privacy risk because files I don't want to be shared are also being shared.
I only want specific pictures or only those files I shared thru HomeGroup to be shared, but my entire user profile folder (%Userprofile%) gets shared. I've followed the exact step but when I share for example, some pictures from the Pictures library using HomeGroup on my Windows 7 computer, my entire users folder is shared/made available on the home network and accessible using any XP or Vista computer in the workgroup. This document here: states that HomeGroup shared files can be accessed by older OSes using standard file sharing and shows how to do that.
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