Have you tried using the SERIAL switch without using the SUPPRESSMSGBOXES option? Hey Acheron, I've tried almost all switches without success, it still asks for serial. C:\Nero.exe /VERYSILENT /NORESTART /USER="KM7MK" /SERIAL="XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XXXX" Please fix it soon as Nero is very importent in my silent installation. Thanks Just out of interest try without user i,e, "C:\Nero.exe /VERYSILENT /NORESTART /SERIAL="XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XXXX" I've double checkd that aswell, no luck either.