The UMDF (Windows User Mode Driver Framework) is the component/service that we're trying to get installed properly.
The Windows Media Format SDK Runtime includes the UMDF and is the component that needs to be installed or reinstalled. Both WMP 11 and Zune will install the FSDK runtime.
Since we don't know the exact problem yet, I don't know the precise steps necessary to cure the problem. I would try these steps...
Disconnect any USB media devices or mobile phones, etc.
Uninstall Zune and WMP and any Windows Media or FSDK Runtime.
Reboot the PC to make sure the uninstalls are complete.
Install Dorado, then WMP 11. (Possibly try the reverse order)
Connect the Zune and see if it will install the driver.
Connecting another media or USB device might kicks start things depending on the driver it uses.
Zune Product Team
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