A metric has a unique ID to identify a particular instance of the metric (associated with one session) and a name that is unique within a session but is designed for comparison of the same metric between sessions.
Requirements
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2