In Windows Server 2008, I have a shared folder.

For my username: NTFS permission (read/modify) Share Permissions (read/modify)

Result when trying to access the share: I can traverse directory and read files, but I cannot write files. When I try to examine my effective permissions, it says "Windows can't calculate the effective permissions for [My Username]".

The folder is owned by the Administrators group (the default), and NTFS read/write permissions are granted to my username, which is a member of the Administrators group.

I notice that to make any changes to the folder locally require me to acknowledge a UAC prompt. Why does that prompt appear?

I also tried creating a new group, giving it full NTFS permissions, and full control in the shared permissions, and added my username to the group. The result is even worse... I cannot even traverse the shared folder directories or read anything at all.