1. In my opinion, it is advised to update so old version of bios. Any way, this document details all changes and improvements included in the newer bios versions:https://downloadmirror.intel.com/26159/eng/WY_0042_ReleaseNotes.pdf
2. In your case use the recovery mode to update bios: once you enter the Power Button Menu (with WY0042.BIO file on USB stick in USB socket), press F4 key instead of F7. Wait few seconds and the bios recovery will start automatically and continue to the end. The computer turns off when the recovery process is complete, or it prompts you to turn it off.
I too would recommend that you upgrade to the latest available BIOS release. Every interim release of the BIOS introduced fixes for uncovered bugs and/or updated versions of firmware with improvements and/or new features. This is all well worth having.
I also recommend that you install the latest BIOS using the Recovery Method. This ensures that all firmware components are updated or refreshed, not just the BIOS. Here's my recommended process for performing this update:
- Format (or reformat, as the case may be) a USB flash disk using the FAT32 file system. Stay away from ExFAT and other clone file systems.
- Download the .BIO file for the latest BIOS and copy it onto this USB flash disk. It should be the only file on the flash disk.
- If it is not already, completely power off the NUC and disconnect its power cord.
- Plug the USB flash disk into one of the NUC's USB ports.
- Flip the NUC over onto its top (I flip it over onto an old mouse pad so its surface isn't marred by anything).
- Undo the four screws so you can remove the bottom panel. For WYKH owners, carefully lift and flip the bottom panel off to side so that the SATA data and power cables are not pulled off the board. For WYK owners, just remove the bottom panel.
- Remove the yellow jumper from the board.
- Reconnect the power cord and reach under the NUC and press the power button.
- The NUC should power up and automatically start the Recovery Update process. Onscreen, you should see its progress being displayed. When it is complete, it will tell you so. Note: if you see no display at all, wait 10 minutes before powering off, just in case the update is actually running (without a display).
- Remove the power cord and replace the yellow jumper on the header (across pins 1 and 2).
- Restore the bottom cover and screw tight. For WYKH owners, be careful to not unplug SATA data and power cables as you do so.
- Flip unit back over, reconnect power, remove USB flash disk and then power unit on.
- When BIOS splash screen appears, press F2 and enter BIOS Setup (Visual BIOS).
- Press F9 and then Y to have the BIOS Configuration set to defaults.
- Go through the configuration screens and change only those necessary to boot (the Boot Order and UEFI configuration, primarily, but I also disable NUMLOCK and a few other things like that). While the parameters supported may have changed during the many interim BIOS updates, most will be the same and the ones that were changed from their previous setting to the default setting will be highlighted. You can thus easily review which you absolutely need to change back to their previous setting.
- Exit from BIOS Setup saving the BIOS Configuration.
- Proceed to boot into your O/S.
Hope this helps,
Your instructions made me check the USB flash drive again. I was using a pretty crappy pharmacy promotional USB Drive.
I changed this up and reformated, and then it worked with the F4 recovery mode.
Thanks so much for your detailed response!
Now all I need to do is work out why the NUC keeps turning on randomly by itself without receiving a command from my Harmony Elite Hub. (might be a question for another thread)
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