Thanks Ubbe and Jan,
I have a recently purchased and licensed copy of W7 Home Premium on DVD that I used to make the Flash Drive copy.. I guess the problem could be a bad SSD, because the error occurs at about the point where W7 files would start being copied to the SSD. One thing I don't understand is why the D54 BIOS does not recognize that the Samsung external Optical Drive is plugged into one of the USB 3.0 ports and show it as a Boot Device.. All USB ports show as enabled in the BIOS and the mouse and keyboard I have plugged in work fine. I think I recall reading that there were some problems with the USB 3.0 ports on the NUC having problems dealing with USB 2.0 devices.
I tried both front and back ports and nothing positive. It is possible that the BIOS is corrupted and cannot read any of the ports. I considered using the 2.0 USB ports on the inside header, but the pin spacing is 2.0 mm rather than the typical 2.54 mm spacing of a USB 2.0 port on a motherboard. Without a proper 2.0 mm connector to USB 2.0 female, the two inside ports are worthless.
I gave up trying to use that particular D54 and exchanged it for another. I used the same memory, but changed the SSD and the USB cable on the optical drive. I plugged the mouse and the keyboard into the Front USB connectors and the Samsung optical drive into the lower USB port on the Back.
When I powered this D54, The BIOS setup (F2) immediately recognized the Samsung Optical drive. I set that a #1 in the boot order, saved the changes (F10) and let it restart.
Windows 7 loaded without any problems from the Samsung and it appears to be going through its startup ritual.
Thanks for helping
I had exactly the same problem with my D54250WYK, I found my problem was my optical mouse. It appears that the NUC bios looks for an optical device when it reboots following the initial file load of W7 from the DVD drive, and when it found the mouse it looked for suitable drivers, which obviously didn't exist - don't forget the bios is only as clever as the person who writes the program.
Anyway, my cure was simple; when W7 reboots following the initial file load, pull out the mouse USB plug until the NUC has found the correct DVD drive and started loading files again, then simply plug the mouse back in and it works just fine.
Hope this helps someone else.
Cheers, ... John
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I had the problem that my NUC (same board) didn't recognise my USB3.0 stick from which I wanted to install Win7 64-bit.
Downgrading to bios version 21 solved my problem. My stick was finally visible as a bootable device and Win7 was installed on my SSD within 10 minutes. Hope this helps!