I also have DP35DP Win 7 Ultimate. Intel recommended driver upgrade. Downloaded PROWIN32.EXE. Run.
Error 1713.INTEL(R) "cannot install one of it's required products".
Are you tring to do the update while online ??? I would download the update and save it to my desktop go off line than run the App. Make sure you turn off all security software first. Sometimes security software can look at a App like this as if it's a virous.