removing-counter-names-and-descriptions-from-the-registry.md

description	ms.assetid	title	ms.topic	ms.date
The unlodctr tool removes the registry entries created by lodctr.	83c0fb91-857c-40d9-8fb8-8734c1b573c4	Removing Counter Names and Descriptions from the Registry	article	05/31/2018

Removing Counter Names and Descriptions from the Registry

The unlodctr tool removes the registry entries created by lodctr. The application name that you pass to unlodctr must match the name of the application key that you created under the Services key. For details on running unlodctr see, Help and Support Center.

Using unlodctr

The unlodctr tool looks up the first and last counter and help index values using the like named registry values under your application's Performance key. The unlodctr tool uses the range of index values to remove the text from Counters and Help values for each language identifier.

Using the index values, unlodctr makes the following changes to the registry.

HKEY_LOCAL_MACHINE
   \SOFTWARE
      \Microsoft
         \Windows NT
            \CurrentVersion
               \Perflib
                  Last Counter = updated if changed
                  Last Help = updated if changed
                  \009
                     Counters = application text removed
                     Help = application text removed
                  \supported language, other than English
                     Counters = application text removed
                     Help = application text removed

The unlodctr tool also removes the First Counter, Last Counter, First Help, Last Help, and Object List values from the application's Performance key located at HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\application-name\Performance.

Note

The unloading function of unlodctr, UnloadPerfCounterTextStrings, is declared in Loadperf.h and exported from Loadperf.dll. This allows you to call this function directly from your uninstall program.