I have multiple Windows 7 machines within a Workgroup. There are Windows 7 Pro and Home Premium editions. I also have a Windows XP Pro machine that I am using as a type of "server" for sharing folders and files for the users. I have set the computers up with user names and passwords on both the Windows 7 and identical user names and passwords on the Windows XP machine. I want to harness "pass through authentication". The folders on the Windows XP machine have the appropriate rights for the particular users, i.e. an Everyone folder that everyone has full access to, and a folder for each of the users that only they have read/write access to. So this all works great for the Windows 7 Pro machines, they can view, read, write, etc the files and folders that they have access to, but I have one machine, a Windows 7 Home Premium edition that has read access, but no write access. The user have view the files and folders, but cannot write to their own folder or the Everyone folder. The setup as far as I can tell is identical on the machines. I am pulling my hair out trying to figure out why its not working on the one machine. Any help would be great.