hres = CoCreateInstance( CLSID_WbemLocator, 0, CLSCTX_INPROC_SERVER, IID_IWbemLocator, ( LPVOID* ) &pLoc );

D>Действительно, такого (IID_IWbemLocator dc12a687-737f-11cf-884d-00aa004b2e24) COM класса в моём реестре нет .

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The WMI Software Developer Kit (SDK) is available as a download that
includes documentation at the Download Center. The WMI Redistributable Components version 1.0 file,
is required only for Windows 2000 and is available to download at the same location.
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