Thank you for contacting the Intel community.
When you say you follow all the steps to install the thunderbolt, what are those steps?
If there is one already installed, try uninstall it and then reinstall the latest version.
Remember that a Thunderbolt device needs to be connected to the NUC for the update to run properly, also make sure you have the latest BIOS version, you can download it here:
BIOS Update [KYSKLi70.86A]
Please see F7 BIOS Update Instructions for Intel® NUC
The External Thunderbolt device is always attached when running the Thunderbolt3 Firmware Update.
To fix the problem these were the steps I took:
1. Updated the BIOS ( even though the BIOS is already up to date)
2. Reinstalled the Intel Chipset, then rebooted the computer
3. Reinstalled the Management Engine drivers, then rebooted the computer
4. Ran the Thunderbolt3 Firmware Update
Thank you for taking your time to share this valuable information with us and I’m glad that this issue has been resolved.
I hope you can have better experience with the thunderbolt from now on.
I made a new installation of Windows 10 64bit on the new NUC6i7kyk to see if the error would occur again.
I installed all current drivers, software and updated the BIOS.
I installed the current Thunderbolt 3 bus driver that I downloaded from your website.
I downloaded the Thunderbolt3 FIRMWARE update (#25) and Thunderbolt3 FIRMWARE update (#18)
I connected our Thunderbolt3 device to the NUC6I7KYK
Ran the Thunderbolt3 firmware (#25) update>>>>boom>>> same error again.
Ran the other Thunderbolt3 Firmware (#18)>>same error
I would suggest that you do the same process so you can duplicate the error.
It seems like the new Thunderbolt3 bus driver is somehow corrupted or causing an issue with the Thunderbolt3 firmware update software regardless of what rev you use.
Why did I say that? I've checked the previous Thunderbolt3 bus driver / software that I downloaded a month ago and compared that to the current one that is posted on your website, they are different file size and revision, see attached picture
I removed the current Thunderbolt3 bus driver and installed the older rev Thunderbolt3 bus driver>> ran the Thunderbolt3 firmware update (#25)>> it worked. Ran the Thunderbolt3 firmware update (#18) it worked also.
The older Thunderbolt3 bus driver revision (that I downloaded a month ago) works with the Thunderbolt3 firmware update (#18 and #25).
The current Thunderbolt3 bust driver that is posted on your website does not work with Thunderbolt3 firmware update>> this causes the error.
I would highly suggest that you do the same process so you can duplicate the issue / error.
Thank you for the information and to further investigate the issue could you please provide us with your system information. You can use the Intel® SSU (Intel® System Support Utility) to get your system information.
Intel® System Support Utility for Windows*
What is the thunderbolt device model that you connect to your Intel® NUC?
Please provide us with this information to try to duplicate the issue.