I was have similar problem as in this topic:
I tried all instructions, but it wasn't help me. Then I connect to the chat with technical support from url http://intelsupportchat.force.com/icslivechat/ics_tech_processor_ww_english_Chat http://intelsupportchat.force.com/icslivechat/ics_tech_processor_ww_english_Chat, they offerd me restore BIOS. And I was restore this from 0054 to 0053. And after load system bluetooth began to work!!
URL with old version bios: https://downloadcenter.intel.com/download/27614/BIOS-Update-KYSKLi70-86A-?product=89187 Download BIOS Update [KYSKLi70.86A]
URL with recovery instructions (I use variant with "BIOS Recovery by the Power Button Menu"): https://www.intel.com/content/www/us/en/support/articles/000005532/mini-pcs.html BIOS Recovery Update Instructions for Intel® NUC
It's topic for all, who have problem with bluetooth adapter on nuc6i7kyk. And if who know, say when I will can update my BIOS to latest...
Thank you for contacting us.
I understand that you were experiencing issues with the Bluetooth service on your Intel® NUC NUC6i7KYK.
I am very glad to hear that the recommended troubleshooting helped you to solve the issue, as well; we really appreciate your post since will be taken as a point of reference to other community peers that may encounter the same problem.
I will lead an investigation regarding the BIOS version that was triggering the issue, I will reach you back as soon as possible to let you know the results and to provide you with a more solid answer as the case will be escalated in order to determine if there is something wrong with the BIOS version 0054.
I hope this helps.
Thank you for your response.
During these past days we were able to test the unit and its different BIOS versions starting from the version 0050, up to the latest one 0055.
I regret to inform you that we were not able to replicate your issue as the BIOS version 0054 did not cause any of the issues that you reported, however we are pretty interested on helping you out, please go ahead and perform a BIOS update to the latest version found here:
Please let us know the behavior of the machine after the update as you case has higher priority in our support team.
I hope to hear from you soon.