Once the update process has started, do not power down your system until the update is complete. The update process will take up to 3 minutes. If a BIOS update process is interrupted, your computer may not function properly. We recommend the process be done in an environment with a steady power supply (preferably with UPS).
Downgrading the BIOS to an earlier version isn’t recommended and might not be supported. An earlier BIOS version might not offer support for the latest processors, bug fixes, critical security updates, or support the latest board revisions currently being manufactured. If you're trying to downgrade to a previous BIOS version and its ME Firmware version is older than that currently on the motherboard, then the downgrade is not supported.
Before you start, record all BIOS settings that have been changed from default, so they can be restored after completing the BIOS update.
If upgrading from a BIOS version more than one generation older than current, you may have to run the update two times to fully upgrade they BIOS. See the BIOS's release notes for more information.
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Express BIOS Update (Windows-based)
Download and save the Express BIOS Update (.EBU.exe) file to a temporary folder. Example:
Double-click the .EBU.exe to run the Express BIOS update.
A command dialog appears. Press Y to restart the computer and start the update.
Wait 2-5 minutes for the update to complete.
When the BIOS update is complete, the computer will boot back into Windows.
F7 Update
The F7 BIOS update option allows you to update the system BIOS during the boot process and before the operating system loads.
Download and save the Recovery BIOS (.CAP) file to a USB device. Example:
Plug the USB device into a USB port of the target computer.
Start the NUC. During boot, when the F7 prompt is displayed, press F7 to enter the BIOS Flash Update tool.
Select the USB device and press Enter.
Select the .CAP file and press Enter.
Confirm you want to update the BIOS by pressing Enter.
Wait 2-5 minutes for the update to complete.
When the BIOS update is complete, the computer will boot back into Windows.
Power Button Menu Update
The Power Button Menu Update allows you to update the system BIOS during the boot process and before the operating system loads.
Download and save the Recovery BIOS (.CAP) file to a USB device. Example:
Plug the USB device into a USB port of the NUC when it’s turned off (not in Hibernate or Sleep mode).
Press and hold down the power button for three seconds, then release it before the 4 second shutdown override. The Power Button Menu displays. (Options on the menu can vary, depending on the NUC model.)
Press F7 to start the BIOS update.
Wait 2-5 minutes for the update to complete.
When the BIOS update is complete, the computer will boot back into Windows.