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Error Message: “Performance Counters are Disabled or Corrupt”

Performace Counter Error dialog box

Parts of the .NET Framework have a dependency on the performance counter.
A note from Microsoft about the dependency:
System.Diagnostics.Proccess FAQ:Why does the Process class have a dependency on the performance counter?
Occasionally, the files perfc009.dat and perfh009.dat can become corrupted after a Service Pack update.

Windows XP:

Before modifying the Registry it is recommended that you perform a back up:
Microsoft Support: How to back up and restore the registry in Windows XP

Parts of the below solution were taken from:
Microsoft Support: PRB: Performance Object Is Not Displayed in Performance Monitor
Microsoft Support: How to manually rebuild Performance Counter Library values

Step 1: Enable Performance Counters by modifying the Registry

  1. Click Start…Choose Run
  2. Type Regedit.exe and press the ENTER key.
  3. Select Find from the Edit menu.
  4. In the Find What field, type Disable Performance Counters.
  5. Click Find Next.
  6. If the Registry value is set to 1, set the value to 0.
  7. Press the F3 key to find the next occurrence of this Registry value.
  8. Repeat the previous two steps until there are no Performance keys that have the Disable Performance Counters value set to 1.

Step 2: Copy perfc009.dat and perfh009.dat into the %Systemroot%\System32\ folder.

  1. Expand the Perfc009.dat file and the Perfh009.dat file. These files are located on your Windows Installation Disc. The compressed files are found at DriveLetter:\i386\perfc009.da_ and at DriveLetter:\i386\perfh009.da_. You should be able to expand/extract the files with something a program such as WinZip or WinRAR.
  2. Click Start…Choose Run.
  3. Type %Systemroot%\System32\ and press the ENTER key.
  4. Make a backup of the files perfc009.dat and perfh009.dat – if they exist (with a .bak extension just in case you need them later).
  5. Take the files you expanded above and replace the files that are in the %Systemroot%\System32\ folder.
  6. Restart your computer

Windows 7 and Windows Vista:

To rebuild all performance counters type the following commands at a Command Prompt. Press ENTER after each command.

  • cd %Systemroot%\System32\
  • lodctr /R


  • You can get to the Command Prompt by typing Command Prompt in the Search box on the Start menu.
  • /R is uppercase. You must have administrative rights on the computer to successfully perform this command.
  • Make sure you run the command prompt as an administrative user.
  • Reboot your machine after these steps.