Hi, I try to install a HP Printer Driver as part of a large POST Installation. each machine has a couple (2-3) Printers on the local ports. That is the reason to do that not with the unattend installation. I try to install the driver with the command line rundll32 printui.dll,PrintUIEntry /if /b "hp deskjet 960c series" /f "C:\WINDOWS\DRIVERS\hpf960k.inf" /r "lpt1:" /m "hp deskjet 960c series" /z the installation for the driver works fine. but if I plug the printer on the machine the plug and play hardware detection found the printer and ask again for the driver. If I click on the cancel button the printers works fine. How can I block, disable or whatever do that the dialog will not displayed regards Klaus