When viewing Devices in Windows 7, the DC53427HYE (i5) shows an O&O DiskImage Virtual Device but no device driver. Attempts to install a device driver via Windows Update fail.
I have several i5's and they all show the same item as uninstalled. The i3 NUCs (DC3217IYE) all have the O&O installed correctly.
NOTE: I originally created a "master disk" on the i3 platform. I have cloned it to other i3's and i5's as well. No issue with the i3's. For the i5's I manually replaced all the i3 drivers with i5 drivers from the Intel support site (NOT using auto update). Or, at least I thought I did. Seems that I overlooked something.