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NUC 6i7KYK Bios update



I had my lovely NUC running Windows 10 for a few months and decided to update Bios. It was going from the 2016 to 2020 (version 9/9/2020). I went to downloaded new Bios bio file flashed it F7 (did this many times in the past) then reboot.

Error message missing windows/system32/winloader.exe. I then tried to Repair the boot sequence (I figured the boot had been corrupted). I found the Recovery section to create a usb recovery boot. I went to repair via command prompt using bootrec/fixmbr, (successful) bootrec/fixboot (not found) and bootrec/rebuildbcd (successful).

No luck. I wondered if my SSD had a problem Samsung 860 EVO. I am about to try Samsung magician but was going to restore old bios which I have not been able to find.

I will update this as I troubleshoot the problem.

Thanks in advance,


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3 Replies


I took a recovery usb from an Asus laptop and installed Windows 8 (original os) on Nuc. I then went to connect to internet as the drivers were not recognised. I then went to get the bundled drivers from Intel for the NUC.

Tried three times each showed an error with download. I need to get correct drivers to talk to the internet to run the Samsung Magician plus upgrade to Windows 10. 

Each step seems to present new problems

Super User Retired Employee

That All-Drivers package is a pretty big download. If you are not in North America, I recommend that you download the packages one at a time. The other option is to install the Intel Driver and Support Assistant (IDSA) and have it manage it for you.

Hope this helps,




Thanks. I usually download large files in Australia without any problems with checksum and I was worried that it was tampered with - I teach cybersecurity. I now have Windows 10 operational on the NUC.

I did make a mistake when I downloaded the wifi driver (yes I did it case by case) as I went straight to the Windows 10 version. No good it wanted the Windows 8 version which was further down on the list. 

One trick was to do a reset to default settings F9.  Not sure if it worked but always reset to factory.

Now here is the interesting thing. The Bios is the 9/9/2020 version happily working with Windows 10. I visualise it as Win 10 block on top of another Bios block. When I first changed the bios the mbr was broken and hard to repair. Always do bios updates first was my rule of thumb for many years.

All good - time to close