bios

https://downloadcenter.intel.com/download/23607

current: WYLPT10H.86A.0021.2013.1017.1606
i5-4250U @ 1.30GHz

make sure that usb keychain you are using with F7 bios update option has GPT partition table on it!

dpavlin@x200:~$ sudo gdisk -l /dev/sdc
GPT fdisk (gdisk) version 1.0.1

Partition table scan:
  MBR: protective
  BSD: not present
  APM: not present
  GPT: present

Found valid GPT with protective MBR; using GPT.
Disk /dev/sdc: 3948544 sectors, 1.9 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): 7564450A-7BE4-41EA-90E3-809C8C50BE51
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 3948510
Partitions will be aligned on 2048-sector boundaries
Total free space is 2014 sectors (1007.0 KiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1            2048         3948510   1.9 GiB     0700  Microsoft basic data

headers

http://www.legitreviews.com/intel-nuc-kit-d54250wyk-review-the-nuc-gets-haswell-power_124251/2