IB
there are two things can be wrong. first it would be easier for your computer to recognise if it is on dvd than usb. Your computer may not load usb drivers till later. the second thing is it may be looking for something other than an exe file. HP may have 2 versions. One exe, and the other an *.inf file.
the exe file may expand to the inf folder, I dont know. You may have to look around a bit.
ken