SetupAPI logs messages that relate to loading class installers and co-installers only if an error occurs or if one of the verbose logging levels is set. For example, the following error message is logged if a co-installer for an Oven device is not a valid DLL—which can result from the co-installer file having been inadvertently overwritten.
#E144 Loading module "Oven_File_Path\Oven_Co-installer_File_Name.dll" failed. Error 193: %1 is not a valid Win32 application.
Note
SetupAPI writes %n in an error message if it does not have the corresponding substitution text when it logs the message.
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