in your batch file or however u are calling that program, u are missing quotes " " it should look like this "%Programfiles%\something.exe" & for your virus thing, u cant run a setup.exe with .msi switches, u need 1 or the other EDIT: instead of having those lines in cmdlines.txt just add a refrence to a cmd file & use those lines in a cmd file also, u have files being called with no switches, u should add the appropriate switches