dpinst.exe is the executable file for the Driver Package Installer, a component of Driver Install Frameworks (DIFx) version 2.1.
As far as I know, Driver Install Frameworks (DIFx) Tools is no longer available for download: to obtain the most current version of the DIFx Tools you have to download the Windows Driver Kit from
http://msdn.microsoft.com/en-US/windows/hardware/gg487428.
Bye.
Luigi Bruno
Marked as answer byCloud_TSTuesday, April 30, 2013 5:47 AM