Disclaimer: This procedure involves editing the Windows registry. Adobe doesn't provide support for editing the registry, which contains critical system and application information. Make sure to back up the registry before editing it. For more information about the registry, see the Windows documentation or contact Microsoft.

  1. Choose Start > Run.
  2. Type regedit in the Open box, and then click OK to start the Windows Registry Editor.
  3. Navigate to the following registry key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Drivers32.
  4. Double-click the codec that you want to disable.



    Note: Video codec listings usually start with vidc; audio codec listings usually end with an .acm extension.

     
  5. In the Edit String dialog box, add a semicolon (;) to the beginning of the value in the Value Data box to disable the entry. For example:



    ;iyuv_32.dll

     
  6. Click OK.
  7. Close the Registry Editor window.

To reenable a video or audio codec:

  1. Choose Start > Run.
  2. Type regedit in the Open box, and then click OK to start the Windows Registry Editor.
  3. Navigate to the following registry key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Drivers32.
  4. Double-click the codec that you disabled, and remove the semicolon from the beginning of the value in the Value Data box.
  5. Click OK.

The Adobe Captivate demonstration below illustrates how to temporarily disable a codec. For more information about viewing this demo, see Viewing Adobe Captivate Demos in Knowledgebase Documents (TechNote kb403894).

 

 

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