Engine Permissions
Engines installed by an administrator but run by a non-admin user can have permission issues, especially if the Engine removes a registry key and creates it on an update event. This section contains a list of keys created and used by Engines. Use this list to help determine what permissions to set so that Engines function properly.
The following registry keys are used for performance monitoring and require only read access after install:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NetFramework
HKEY_LOCAL_MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0
HKEY_DYN_DATA\PerfStats\\StartStat
HKEY_DYN_DATA\PerfStats\\StatData
HKEY_DYN_DATA\PerfStats\StopStat
HKEY_LOCAL_MACHINE\SOFTWARE\microsoft\windows nt\currentversion\perflib