I am in no way knowledgeable about this, but when I visited the Zotac web site I saw "GeForce 9300 ITX Chipsets driver for Win 7 & Vista 32bits."
And also "GeForce 9300 ITX BIOS and Update utility (For PCB 03 & newer Versions)"
In both cases the web site says, "!!!Please identify the PCB version first!!!"
Did you do all that?
If so, hang on and see if others with more expertise responds.
I have been running Win XP with a Zotac GeForce 9300-ITX WiFi motherboard for the last several months. I just upgraded to Windows 7 32-bit. The computer boots fine and has assigned some generic driver to my onboard video card instead of properly identifying it as an nvidia. I believe the entire motherboard may have been misidentified. Trying to install the drivers from nvidia doesn't work. The setup just says it can't find any supported hardware and exits. I have tried a couple of versions with no difference in results. The device manager does not show any graphics cards, so I can't even try to select a driver manually. I have tried installing drivers from the original motherboard disc, and the latest from Zotac's website.
If anyone has ideas on possible solutions I would appreciate them.