Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1, Windows Server 2003 with SP2


Registers new Performance counter names and Explain text for a service or device driver, and saves and restores counter settings and Explain text.


lodctr FileName [**/s:FileName] [/r:FileName] [/t:**ServiceName]

  • FileName
    Registers the Performance counter name settings and Explain text provided in initialization file FileName.
  • /s: FileName
    Saves Performance counter registry settings and Explain text to file FileName.
  • /r
    Restores counter registry settings and Explain text from current registry settings and cached performance files related to the registry. This option is available only in the Windows Server 2003 family of operating systems.
  • /r: FileName
    Restores Performance counter registry settings and Explain text from file FileName.

  - If you use the **lodctr /r** command, you will overwrite all Performance counter registry settings and Explain text, replacing them with the configuration defined in the file specified.  
  • /t: ServiceName
    Indicates that service ServiceName is trusted.
  • /?
    Displays help at the command prompt.


  • Incorrectly editing the registry may severely damage your system. Before making changes to the registry, you should back up any valued data on the computer.
  • If the information that you supply contains spaces, use quotation marks around the text (for example, "File Name").

To save the current Performance registry settings and counter Explain text to file perf backup1.txt, type:

lodctr /s:"perf backup1.txt"

Formatting legend

Format Meaning


Information that the user must supply


Elements that the user must type exactly as shown

Ellipsis (...)

Parameter that can be repeated several times in a command line

Between brackets ([])

Optional items

Between braces ({}); choices separated by pipe (|). Example: {even|odd}

Set of choices from which the user must choose only one

Courier font

Code or program output

See Also


Add counters to System Monitor
Troubleshooting Performance monitoring
Command-line reference A-Z
Command shell overview