Adprep was unable to set the value of registry key %1 to %2 Status/Consequence This ADPREP operation failed. User Action ...

Adprep was unable to set the value of registry key %1 to %2
[Status/Consequence]
This ADPREP operation failed.
[User Action]
Verify that this registry subkey and key exists and is accessible. Check the log file ADPrep.log in the %3 directory for more information. Restart Adprep.