Thanks for joining the NUC community.
I understand you have loaded Windows 8.1 via USB and the BIOS detect every USB thumb drive as Kingston branded.
I have never heard about this matter previously. It might be just a small problem with the computer detecting USB flash drives. At this stage, make sure customer has the latest NUC BIOS or wait for newer versions here:
File name: EBH7710H.86A.0101.EB.EXE