Guten Morgen Herr Esser,
laut der
MSDN Seite, sollte der gesuchte Parameter /f sein.
/f
Sets the forceIfDriverIsNotBetter flag to ON, which configures DPInst to install a driver on a device even if the driver that is currently installed on the device is a better match than the new driver.
Setting the installAllOrNone Flag
By default, DPInst installs all of the driver packages that can be installed. If some driver packages cannot be installed, DPInst informs the user on the DPInst finish page which driver packages were installed and which drivers could not be installed. You can use the installAllOrNone flag to configure DPInst to install all of the driver packages only if all of the driver packages can be installed. This flag can also be used to configure DPInst to install the driver packages in a specific driver package group only if all of the driver packages in the driver package group can be installed.
By default, the installAllOrNone flag is set to OFF for all of the driver packages and driver package groups. To set the installAllOrNone flag to ON for all of the driver packages, including those in driver package groups, include a installAllOrNone XML element as a child element of a dpinst XML element in a DPInst descriptor file, or use the /a DPInst command-line switch. To set the installAllOrNone flag to ON for only a driver package group, include an installAllOrNone element as a child element of the corresponding group XML element.