Thank you for bringing this to our attention, let me help you on this matter.
I understand that after BIOS update the processor usage has increased.
Allow me some time to do a research on this matter and I will update this thread as news become available.
Thank you for your time.
Thank you for your patience.
I have been testing BIOS version 0042 on same Intel® NUC model but I did not get same issues previously reported.
The only difference was the operating system was fully updated to version 1709
Please test updating the operating system https://support.microsoft.com/en-us/help/4028685/windows-10-get-the-fall-creators-update here
Let me know your findings.