Intel® NUCs
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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

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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,


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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

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