Data stored in this key is part of user profile that is enabled for roaming. A roaming user works on more than one computer in a network. The user profile for a roaming user is kept on a server on the network and is loaded onto a system when the user logs on. For a user profile to be considered for roaming, the operating system must support roaming profiles and it must be enabled.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)