FAQ: Why are some folders, map documents, and template files visible through ArcMap but not when browsing through Windows Explorer on Vista?
Why are some folders, map documents, and template files visible through ArcMap but not when browsing through Windows Explorer on Vista?
Folders, map documents, and templates saved to locations under C:\Program Files, for example, a personal map template folder in C:\Program Files\ArcGIS\bin\templates, are visible in ArcMap but are not when browsing Windows Explorer on Vista.
This is because the user profile is a member of the Users group, which does not have write access to the Program Files directory. Vista automatically redirects the file/folder to the virtual store, a location in the user's profile, for example C:\Users\<your_user_profile>\AppData\Local\VirtualStore\Program Files\.
See the Data Redirection subsection of the Microsoft TechNet article linked in the Related Information section below for more information.