HKEY_PERFORMANCE_DATA provides runtime information into performance data provided by either the Windows NT kernel itself, or running system drivers, programs and services that provide performance data.

HKEY_PERFORMANCE_DATA key is not stored in any hive and not displayed in the Registry Editor, but it is visible through the registry functions in the Microsoft Windows API, or in a simplified view via the Performance tab of the Task Manager (only for a few performance data on the local system) or via more advanced control panels (such as the Performances Monitor or the Performances Analyzer which allows collecting and logging these data, including from remote systems).

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