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Asked: 2026-05-30T21:07:06+00:00

I am trying to set windows desktop search to use a different html filter

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I am trying to set windows desktop search to use a different html filter other than the system default filter(nlhtml.dll). When I look up the PersistentHandler (HKEY_LOCAL_MACHINE\SOFTWARE\Classes\.html\PersistentHandler) it points to HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{eec97550-47a9-11cf-b952-00aa0051fe20}.

I want to change the value of above clsid. Following is the WiX snippet

<?define PersistentHandler_HtmlIFilter="eec97550-47a9-11cf-b952-00aa0051fe20"?>

<RegistryValue Action="write" Root="HKLM" Key="SOFTWARE\Classes\CLSID\{$(var.PersistentHandler_HtmlIFilter)}" Value="MY HTML Persistent Handler" Type="string" />

But the value is not changed.

Regarding permission;
Only TrustedInstaller has full control of this entry. Administrator, SYSTEM and other users only have read permission.

How can I get elevated permission to make this registry change using WiX. This is part of a larger project and I am only editing a fragment of WiX script (<Fragment>.. </Fragment>).

Thank you.

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1 Answer

  1. Editorial Team

    You cannot. Registry keys limited to TrustedInstaller indicate keys that are protected by Windows Resource Protection. Windows Installer will not modify these keys.

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