Just a word on syntax when using [iNSTINF] Proper Use: [iNSTINF] %wpipath%\INSTALLDIRECTORY\FILEDIRECTORY\FILENAME.INF Notice, no spaces or quotes. The INF Path name may not contain any spaces, commas or quotation marks. This is imposed by the DOS path structure of the command. Normally, a Quote around the command would fix the file name issue, but there is some issue with rundll32 command line that breaks it.